FAQ: Can I use Seachem Reef Calcium™ with my fish or corals?

You can!  Reef Calcium™ is specifically formulated to support coral growth, and is perfectly fine to use with fish or invertebrates.  If you are maintaining a fish-only system (FOWLR aquarium), it is unlikely you will need to regularly dose calcium to maintain ideal levels, and it is not recommended to regularly use polygluconate calcium (the form in Reef Calcium™) if you do not have corals which utilize this form of calcium.  Polygluconate complexed calcium is NOT HARMFUL to fish, but if corals are not using up this calcium, bacteria in the water column will do so instead, leading to slight haziness in the water.