FAQ: Can I use Seachem Reef Fusion 1™ with my fish or corals?

You can!  Reef Fusion 1™ 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), it is unlikely you will need to regularly dose calcium to maintain ideal levels, as it is primarily coral growth that depletes calcium levels in saltwater.