{"title":"Aquarium Sand \u0026 Substrate","description":"\u003cp class=\"_p_nvzmr_104\"\u003e\u003cspan\u003eBuild the foundation of a thriving reef ecosystem with our curated selection of premium aquarium sand and substrate. Whether you're cycling a new tank or upgrading an established system, the right substrate plays a critical role in biological filtration, water chemistry stability, and creating a natural environment for your marine life.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"_p_nvzmr_104\"\u003e\u003cspan\u003eOur sand and substrate options include live aragonite sand pre-seeded with beneficial bacteria for instant cycle support, as well as specialized grain sizes suited for different tank inhabitants—from sand-sifting gobies and burrowing invertebrates to delicate corals that benefit from stable pH buffering.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"_p_nvzmr_104\"\u003e\u003cstrong\u003e\u003cspan\u003eWhy Substrate Matters:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"_ul_nvzmr_140\"\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eBiological Filtration\u003c\/strong\u003e – Provides surface area for beneficial bacteria that process ammonia and nitrites\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eNatural pH Buffering\u003c\/strong\u003e – Aragonite-based substrates help maintain stable alkalinity and calcium levels\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eAesthetic Appeal\u003c\/strong\u003e – Creates authentic reef environments with natural colorations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e\u003cstrong\u003eHabitat Enrichment\u003c\/strong\u003e – Supports natural behaviors in sand-dwelling fish and invertebrates\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"_p_nvzmr_104\"\u003e\u003cspan\u003eChoose from trusted brands like CaribSea and explore grain sizes, colors, and live versus dry options to match your specific reef goals.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"caribsea-black-reef-sand","title":"Caribsea black Reef Sand","description":"\u003cp\u003eCreate a dramatic, modern reef display with CaribSea Black Reef Sand. This premium aragonite substrate combines striking black aesthetics with the same buffering and biological benefits of natural reef sand.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e100% natural aragonite with black coloration\u003c\/li\u003e\n\u003cli\u003eMaintains stable pH and alkalinity\u003c\/li\u003e\n\u003cli\u003eSupports beneficial bacteria colonization\u003c\/li\u003e\n\u003cli\u003eCreates stunning contrast with colorful corals\u003c\/li\u003e\n\u003cli\u003eSafe for all reef inhabitants\u003c\/li\u003e\n\u003cli\u003ePre-washed and aquarium-ready\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePerfect For:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eContemporary reef aquascapes\u003c\/li\u003e\n\u003cli\u003eHighlighting coral colors and fluorescence\u003c\/li\u003e\n\u003cli\u003eDeep sand bed filtration systems\u003c\/li\u003e\n\u003cli\u003eUnique, high-contrast displays\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe bold black substrate makes coral colors pop while providing the same natural buffering capacity reef keepers depend on.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"33.99","offer_id":52275929579799,"sku":null,"price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/80AEC757-8B7C-4831-96D0-4439865B8AB0.jpg?v=1771093024"},{"product_id":"caribsea-arag-alive-fiji-pink-live-sand-20-lb","title":"CaribSea Arag-Alive Fiji Pink Live Sand, 20 lb.","description":"\u003cp\u003eTransform your reef aquarium with CaribSea Arag-Alive Fiji Pink Live Sand—a premium substrate that brings the natural beauty and biological benefits of a living reef directly to your tank. This 20 lb. bag contains authentic aragonite sand infused with live marine bacteria, making it the ideal foundation for a thriving saltwater ecosystem.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstant Cycle Support\u003c\/strong\u003e – Pre-seeded with millions of live marine bacteria to accelerate biological filtration and reduce new tank syndrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural pH Buffering\u003c\/strong\u003e – 100% aragonite composition helps maintain stable alkalinity and calcium levels essential for coral growth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuthentic Fiji Pink Aesthetic\u003c\/strong\u003e – Gorgeous pink and white coloration mimics natural Indo-Pacific reef environments\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimal Grain Size\u003c\/strong\u003e – Perfect texture for burrowing invertebrates, sand-sifting fish, and natural detritus management\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo Rinsing Required\u003c\/strong\u003e – Packaged wet with live bacteria in a breathable bag; ready to use straight from the package\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eReef aquariums, mixed coral systems, fish-only-with-live-rock (FOWLR) setups, and any saltwater environment where natural biological filtration and authentic aesthetics matter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCare Notes:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFor best results, gently pour into your aquarium and allow 24-48 hours for settling. The live bacteria will immediately begin colonizing your system. Compatible with all reef-safe inhabitants.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":51795927335191,"sku":null,"price":33.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/0925F52E-CB53-47FF-997B-C598B4281436.jpg?v=1768253406"},{"product_id":"caribsea-arag-alive-bahamas-oolite-10lb","title":"CaribSea Arag-Alive Bahamas Oolite 10lb","description":"\u003cp\u003eYou can now bring the world’s most exotic reefs into your home with CaribSea’s Arag-Alive!™ substrates. Eight environmentally accurate ecoscapes, developed through CaribSea’s cooperation with public aquariums and zoological parks where authenticity is a must, Arag-Alive!™ makes any aquarium uniquely yours. Arag-Alive!™ makes it easy to set up an aquarium. It’s ready to work, clears quickly, and contains millions of live bacteria to cycle super fast and create a natural biological balance. Arag-Alive!™ suppresses the dreaded “new tank syndrome”, compresses the ammonia cycle, and discourages nuisance algae. In fact, independent labs prove Arag-Alive!™ cycles days faster than other brands of live sand. That’s what makes Arag-Alive!™ the choice of new aquarists and maintenance companies where speed of set up, beauty, and reliability are demanded.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688556884247,"sku":"S1488","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_794_enhanced_20260313_165358_jt3d3w.png?v=1778020644"},{"product_id":"caribsea-arag-alive-fiji-pink-reef-sand-15lb","title":"CaribSea Arag-Alive Fiji Pink Reef Sand 15lb","description":"\u003cp\u003eCaribSea Aragonite Products Nobody puts as much effort into bringing you the quality and selection of aragonite products as CaribSea does. All of our substrates are scientifically sound and proven products. Aragonite, purposely engineered and free of impurities such as ash, metals, pesticides, and silica; allows you to create a safe and beautiful environment for your fish and invertebrates. Why take chances with other brands? Fiji Pink Reef Sand - This is a good intermediate sand size product. The precise 0.5 - 1.5 mm grain size combines some of the animal friendly properties of fine sand such as ingestibility and low resistance to burrowing, with better diffusive flux properties and good porosity.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557015319,"sku":"S1612","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_793_enhanced_20260313_165320_ood7t4.png?v=1778020647"},{"product_id":"caribsea-arag-alive-fiji-pink-reef-sand-40lb","title":"CaribSea Arag-Alive Fiji Pink Reef Sand 40lb","description":"\u003cp\u003eCaribSea Aragonite Products Nobody puts as much effort into bringing you the quality and selection of aragonite products as CaribSea does. All of our substrates are scientifically sound and proven products. Aragonite, purposely engineered and free of impurities such as ash, metals, pesticides, and silica; allows you to create a safe and beautiful environment for your fish and invertebrates. Why take chances with other brands? Fiji Pink Reef Sand - This is a good intermediate sand size product. The precise 0.5 - 1.5 mm grain size combines some of the animal friendly properties of fine sand such as ingestibility and low resistance to burrowing, with better diffusive flux properties and good porosity.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557048087,"sku":"S1614","price":76.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_799_enhanced_20260313_165552_rtlmwt.png?v=1778020648"},{"product_id":"caribsea-arag-alive-natural-reef-16lb","title":"CaribSea Arag-Alive Natural Reef 16lb","description":"\u003cp\u003eNatural Reef Arag-Alive! Live Aragonite Reef Sand contains millions of live bacteria to create a natural biological balance in your reef tank.\u003c\/p\u003e\n\n\u003cp\u003eContains live bacteria to assist with a faster cycle\u003c\/p\u003e\n\n\u003cp\u003eGrain size: 3.0 - 5.0mm\u003c\/p\u003e\n\n\u003cp\u003eHigh Surface Area for Bacteria\u003c\/p\u003e\n\n\u003cp\u003eLargest variety of particle size\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557113623,"sku":"S1483","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_801_enhanced_20260313_165636_uiayv8.png?v=1778020649"},{"product_id":"caribsea-arag-alive-special-grade-reef-sand-10lb","title":"CaribSea Arag-Alive Special Grade Reef Sand 10lb","description":"\u003cp\u003eArag-Alive! Special Grade Reef Sand - 10 lb\u003c\/p\u003e\n\n\u003cp\u003eBring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Beauty and brains, Arag-Alive helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae. The quick clearing Arag-Alive contains millions of bacteria per pound specially engineered for aggressive waste reduction. It is engineered to suppress \"new tank syndrome\" and compress the ammonia cycle. The 10 pound bag of Special Grade Reef Sand has a typical size between 1.0 mm and 2.0 mm and features an average density of 85 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557146391,"sku":"S1449","price":28.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_802_enhanced_20260313_165655_w44wx1.png?v=1778020651"},{"product_id":"caribsea-florida-crushed-coral-10lb","title":"CaribSea Florida Crushed Coral 10lb","description":"\u003cp\u003eGeo-Marine Florida Crushed Coral - 10 lb\u003c\/p\u003e\n\n\u003cp\u003eCaribSea's Geo-Marine Florida Crushed Coral is the only crushed coral with aragonite and provides over 25 times the buffering capacity of other crushed corals. In actuality, this product is not crushed at all, but is a natural product that is screened to size. The unbelievably natural substrate provides dramatic color and texture to your aquarium environment and combines well with fine reef sand offering creatures such as jawfish, blennies and burrowing crustaceans an opportunity to dig, burrow and create their own unique homes. Due to the fact that the Coraline Caribbean Crushed Coral substrate is so coarse, it makes an excellent choice for systems that feature undergravel filtration or where elevated pH levels are required. The substrate has been purposely engineered and is free of impurities such as ash, metals, pesticides, and silica; which allows you to create a safe and beautiful environment for your fish and invertebrates. Can be used alone or as a textural admixture. The 10 pound bag features a typical size between 2.5 mm and 5.5 mm and has an average density of 72 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557277463,"sku":"S1422","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_821_enhanced_20260313_170357_bfdv47.png?v=1778020655"},{"product_id":"caribsea-florida-crushed-coral-15lb","title":"CaribSea Florida Crushed Coral 15lb","description":"\u003cp\u003eGeo-Marine Florida Crushed Coral - 15 lb\u003c\/p\u003e\n\n\u003cp\u003eCaribSea's Geo-Marine Florida Crushed Coral is the only crushed coral with aragonite and provides over 25 times the buffering capacity of other crushed corals. In actuality, this product is not crushed at all, but is a natural product that is screened to size. The unbelievably natural substrate provides dramatic color and texture to your aquarium environment and combines well with fine reef sand offering creatures such as jawfish, blennies and burrowing crustaceans an opportunity to dig, burrow and create their own unique homes. Due to the fact that the Coraline Caribbean Crushed Coral substrate is so coarse, it makes an excellent choice for systems that feature undergravel filtration or where elevated pH levels are required. The substrate has been purposely engineered and is free of impurities such as ash, metals, pesticides, and silica; which allows you to create a safe and beautiful environment for your fish and invertebrates. Can be used alone or as a textural admixture. The 15 pound bag features a typical size between 2.5 mm and 5.5 mm and has an average density of 72 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557310231,"sku":"S1447","price":30.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_822_enhanced_20260313_170415_8gti4h.png?v=1778020656"},{"product_id":"caribsea-florida-crushed-coral-40lb","title":"CaribSea Florida Crushed Coral 40lb","description":"\u003cp\u003eGeo-Marine Florida Crushed Coral - 40 lb\u003c\/p\u003e\n\n\u003cp\u003eCaribSea's Geo-Marine Florida Crushed Coral is the only crushed coral with aragonite and provides over 25 times the buffering capacity of other crushed corals. In actuality, this product is not crushed at all, but is a natural product that is screened to size. The unbelievably natural substrate provides dramatic color and texture to your aquarium environment and combines well with fine reef sand offering creatures such as jawfish, blennies and burrowing crustaceans an opportunity to dig, burrow and create their own unique homes. Due to the fact that the Coraline Caribbean Crushed Coral substrate is so coarse, it makes an excellent choice for systems that feature undergravel filtration or where elevated pH levels are required. The substrate has been purposely engineered and is free of impurities such as ash, metals, pesticides, and silica; which allows you to create a safe and beautiful environment for your fish and invertebrates. Can be used alone or as a textural admixture. The 40 pound bag features a typical size between 2.5 mm and 5.5 mm and has an average density of 72 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557342999,"sku":"S1429","price":71.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_823_enhanced_20260313_170444_lugxch_2a759841-9824-447b-96e5-074ee9a75798.png?v=1778020657"},{"product_id":"caribsea-ocean-direct-live-aragonite-5lb","title":"CaribSea Ocean Direct Live Aragonite 5lb","description":"\u003cp\u003e100% aragonite supports proper pH\u003c\/p\u003e\n\n\u003cp\u003eThis method preserves real live sand with its own original, natural bacteria\u003c\/p\u003e\n\n\u003cp\u003eRe-create natural reef environments\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557768983,"sku":"S1490","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_837_enhanced_20260313_173257_jlmslu_5928bd78-c7c8-4ba8-906f-a69b502765a2.png?v=1778020664"},{"product_id":"caribsea-ocean-direct-original-grade-20lb","title":"CaribSea Ocean Direct Original Grade 20lb","description":"\u003cp\u003eOcean Direct Caribbean Live Sand - 20 lb\u003c\/p\u003e\n\n\u003cp\u003eOcean Direct is different. This pure aragonite substrate utilizes patent pending Sea Breathe laser technology to allow efficient respiration right in the bag. This method preserves real live sand with its own original, natural bacteria. Every bag of Ocean Direct is alive and breathing with up to 1000 times more beneficial water purifying bacterial than other preservation methods. Every grain of Ocean Direct is coated with bacteria and encapsulated, by capillary action, in a film of real ocean water. The thin film is open to the atmosphere for unparalleled gas exchange. This results in high counts of natural and beneficial bacteria with no noxious buildup of metabolic by-products. Each bag contains a packet of Bio-Magnet clarifier to reposition any free floating bacteria to where they are most active: sand beds, live rock surfaces, and biological filtration media. Ocean Direct gives you a thriving, natural aquarium in minutes! The 20 pound bag of Ocean Direct Caribbean Live Sand has a typical grain size between 0.25 mm and 6.5 mm and features an average density of 87 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557801751,"sku":"S1426","price":22.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_838_enhanced_20260313_173316_rvxzyk.png?v=1778020665"},{"product_id":"caribsea-ocean-direct-original-grade-40lb","title":"CaribSea Ocean Direct Original Grade 40lb","description":"\u003cp\u003eOcean Direct Caribbean Live Sand - 40 lb\u003c\/p\u003e\n\n\u003cp\u003eOcean Direct is different. This pure aragonite substrate utilizes patent pending Sea Breathe laser technology to allow efficient respiration right in the bag. This method preserves real live sand with its own original, natural bacteria. Every bag of Ocean Direct is alive and breathing with up to 1000 times more beneficial water purifying bacterial than other preservation methods. Every grain of Ocean Direct is coated with bacteria and encapsulated, by capillary action, in a film of real ocean water. The thin film is open to the atmosphere for unparalleled gas exchange. This results in high counts of natural and beneficial bacteria with no noxious buildup of metabolic by-products. Each bag contains a packet of Bio-Magnet clarifier to reposition any free floating bacteria to where they are most active: sand beds, live rock surfaces, and biological filtration media. Ocean Direct gives you a thriving, natural aquarium in minutes! The 40 pound bag of Ocean Direct Caribbean Live Sand has a typical grain size between 0.25 mm and 6.5 mm and features an average density of 87 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557834519,"sku":"S1418","price":40.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_839_enhanced_20260313_173338_ksdsap.png?v=1778020665"},{"product_id":"caribsea-rubble-zone-1-gallon","title":"CaribSea Rubble Zone 1 Gallon","description":"\u003cp\u003eRubble Zone - 1 gal\u003c\/p\u003e\n\n\u003cp\u003eCaribSea's Rubble Zone is a premium-quality aragonitic material that is ideal for use in a variety of freshwater and marine applications. Limited only by your imagination, this ultra-versatile product will help you anchor coral frags, craft breathtaking visual displays, create filtration-enhancing cryptic zones, and much more! Each container of Rubble Zone contains a random selection (approximately 6 pounds) of 1\" to 4\" easily managable fragments.\u003c\/p\u003e\n\n\u003cp\u003eA Few Rubble Zone Applications:\u003c\/p\u003e\n\n\u003cp\u003eCreating Displays - Place Rubble Zone pieces as desired on the bottom of your aquarium. Surround a large live rock centerpiece with a cluster of Rubble Zone fragments to create a stunning aquatic display.\u003c\/p\u003e\n\n\u003cp\u003eRefugium Use - Place Rubble Zone fragments along the bottom of your refugium. Makes an excellent substrate for macro algae holdfasts, and a superb growing area for copepods and other benthic food sources.\u003c\/p\u003e\n\n\u003cp\u003eCryptic Zones - In a crowded refugium, Rubble Zone can be used right in its container! Simply remove the label and drill several 1\/4\" to 1\/2\" holes. Refill the container with Rubble Zone and situate in an area of your sump with good water flow.\u003c\/p\u003e\n\n\u003cp\u003eEntertaining Burrowing Fish \u0026amp; Inverts - Place Rubble Zone fragments in an empty aquarium, then add fine grain sand to fill the voids for a total depth of 3\" to 4\". Cover the entire aquarium bottom or create a dedicated section.\u003c\/p\u003e\n\n\u003cp\u003eAfrican Cichlid Aquariums - Place Rubble Zone as desired on the bottom of your aquarium. It provides stress-reducing cover for smaller fish, and helps prevent larger fish from disturbing finer substrates. Can also be used inside your filter to provide biological and pH support.\u003c\/p\u003e\n\n\u003cp\u003ePond Use - Rubble Zone provides exceptional biological and pH support in pond filters. Also provides similar support in aquarium filters.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557867287,"sku":"S1423","price":23.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/1423-600x600.png?v=1778020666"},{"product_id":"caribsea-seaflor-special-grade-reef-sand-15lb","title":"CaribSea Seaflor Special Grade Reef Sand 15lb","description":"\u003cp\u003eSeaflor Special Grade Reef Sand - 15 lb\u003c\/p\u003e\n\n\u003cp\u003eA revolution in reef keeping! This is the substrate you've been reading about in all the hobbyist publications. This grade of aragonite is specifically engineered for plenum-type nitrate reducing beds. The pore water space created by precision grading also allows maximum ph support and dissolution of calcium carbonate. Free of impurities such as ash, metals, pesticides, and silica which allows you to create a safe and beautiful environment for your fish and invertebrates. The 15 pound bag of CaribSea Seaflor Special Grade Reef Sand has a typical grain size between 1.0 mm and 2.0 mm and has an average density of 85 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557900055,"sku":"S1450","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_846_enhanced_20260313_173557_mumqci.png?v=1778020667"},{"product_id":"caribsea-seaflor-special-grade-reef-sand-40lb","title":"CaribSea Seaflor Special Grade Reef Sand 40lb","description":"\u003cp\u003eSeaflor Special Grade Reef Sand - 40 lb\u003c\/p\u003e\n\n\u003cp\u003eA revolution in reef keeping! This is the substrate you've been reading about in all the hobbyist publications. This grade of aragonite is specifically engineered for plenum-type nitrate reducing beds. The pore water space created by precision grading also allows maximum ph support and dissolution of calcium carbonate. Free of impurities such as ash, metals, pesticides, and silica which allows you to create a safe and beautiful environment for your fish and invertebrates. The 40 pound bag of CaribSea Seaflor Special Grade Reef Sand has a typical grain size between 1.0 mm and 2.0 mm and has an average density of 85 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52688557932823,"sku":"S1419","price":73.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_847_enhanced_20260313_173615_jktk1u.png?v=1778020667"},{"product_id":"caribsea-arag-alive-bahamas-oolite-20lb","title":"CaribSea Arag-Alive Bahamas Oolite 20lb","description":"\u003cp\u003eYou can now bring the world’s most exotic reefs into your home with CaribSea’s Arag-Alive!™ substrates. Eight environmentally accurate ecoscapes, developed through CaribSea’s cooperation with public aquariums and zoological parks where authenticity is a must, Arag-Alive!™ makes any aquarium uniquely yours. Arag-Alive!™ makes it easy to set up an aquarium. It’s ready to work, clears quickly, and contains millions of live bacteria to cycle super fast and create a natural biological balance. Arag-Alive!™ suppresses the dreaded “new tank syndrome”, compresses the ammonia cycle, and discourages nuisance algae. In fact, independent labs prove Arag-Alive!™ cycles days faster than other brands of live sand. That’s what makes Arag-Alive!™ the choice of new aquarists and maintenance companies where speed of set up, beauty, and reliability are demanded.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52800942080279,"sku":"S1482","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_795_enhanced_20260313_165414_uczzv8_c4b15375-3dd4-4106-8e4d-6828ef39efc0.png?v=1778020646"},{"product_id":"caribsea-arag-alive-special-grade-reef-sand-20lb","title":"CaribSea Arag-Alive Special Grade Reef Sand 20lb","description":"\u003cp\u003eArag-Alive! Special Grade Reef Sand - 20 lb\u003c\/p\u003e\n\n\u003cp\u003eBring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Beauty and brains, Arag-Alive helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae. The quick clearing Arag-Alive contains millions of bacteria per pound specially engineered for aggressive waste reduction. It is engineered to suppress \"new tank syndrome\" and compress the ammonia cycle. The 20 pound bag of Special Grade Reef Sand has a typical size between 1.0 mm and 2.0 mm and features an average density of 85 pounds per cubic foot.\u003c\/p\u003e","brand":"Empire Corals","offers":[{"title":"Default Title","offer_id":52800942145815,"sku":"S1411","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/files\/si_803_enhanced_20260313_165717_y35hxb.png?v=1778020651"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2746\/7287\/collections\/0C78184D-0835-4E93-84D8-F6D387C0A1AD.jpg?v=1768253653","url":"https:\/\/empirecorals.com\/collections\/aquarium-sand-substrate.oembed","provider":"Empire Corals","version":"1.0","type":"link"}