Tropic Marin Bio-Magnesium 16oz
Tropic Marin Bio-Magnesium 16oz
Biologically ideal magnesium supplement for reef aquariums
Replenish essential magnesium
Supplies carbon dioxide to promote photosynthesis
No unwanted byproducts
No phosphates or nitrates
Ionically balanced formula
A sufficient supply of Magnesium is as essential for the growth and wellbeing of reef building coralline algae as Calcium. It is one of the major constituents of seawater and is directly involved in algae photosynthesis, i.e. the conversion of carbon dioxide (CO2) and light into organic compounds. The addition of plain magnesium salt, however, is not sufficient and interferes with the ionic balance of the tank water.
Tropic Marin Bio-Magnesium creates a natural environment in the aquarium and delivers Magnesium and carbon dioxide in a natural, biologically available ionically balanced form.
Feeding & Diet
Feeding & Diet
An opportunistic omnivore, the Pithos Crab will scavenge detritus, uneaten food, and algae — making it a natural cleanup crew member. Supplement with small meaty foods like mysis shrimp or pellets 2–3x per week if natural food sources are limited.
Care & Water Parameters
Care & Water Parameters
The Pithos Crab thrives in stable, well-maintained reef conditions. Target parameters: temperature 72–78°F, salinity 1.025–1.026 SG, pH 8.1–8.4, and alkalinity 8–12 dKH. A mature, established tank of at least 20 gallons is recommended.
Reef & Tank Compatibility
Reef & Tank Compatibility
Generally considered reef-safe. The Pithos Crab coexists well with most corals and peaceful fish. Use caution with very small invertebrates or slow-moving tankmates. Provide ample rockwork and hiding spots to reduce territorial behavior.
Size & Growth
Size & Growth
Pithos Crabs are typically shipped at 0.5–1.5 inches. They are slow-growing and generally remain small, making them well-suited for nano and mid-size reef systems.
Shipping & Live Arrival Guarantee
Shipping & Live Arrival Guarantee
All livestock ships with heat or cold packs as needed and is packaged for safe transit. We stand behind a live arrival guarantee — if your animal arrives DOA, contact us within 2 hours of delivery with a clear photo. See our full DOA policy for claim details.
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