Tropic Marin Bio-Calcium 500g

Tropic Marin Bio‑Calcium is a premium calcium supplement in crystalline form designed for reef aquariums. It supplies biologically ideal calcium and carbonate ions needed for corals, shellfish, and coralline algae to build strong skeletons and grow properly. Unlike many calcium additives, Bio‑Calcium dissolves directly in your tank water — no premixing or drip setups required — and maintains ionic balance without causing pH swings. When dosed correctly, it raises both calcium and alkalinity to help reach natural seawater levels, supporting healthy coral growth without introducing phosphates or other unwanted chemicals.