Using tap water in a reef tank is a risky business given the impurities that exist in most top water. RO (and RO/DI) systems eliminate impurities from the water before you add it to the tank. Chances are there are at least trace l
Using tap water in a reef tank is a risky business given the impurities that exist in most top water. RO (and RO/DI) systems eliminate impurities from the water before you add it to the tank. Chances are there are at least trace levels of chlorine, phosphate and other elements in your water that can do harm to a reef tank. We recommend you either get your water from the local fish store or that you install your own water purification system from one of the options listed here.