News — How to use an ATO

Topping off your aquarium water in regards to a salt water tank, refers to the process of replacing fresh water lost to evaporation. When water evaporates from a salt water of reef aquarium, the salt stays in the tank, but the water evaporates, thus creating a need to replenish or "top off" the fresh water in the tank so that the salinity levels do not go too high, and so that heaters do not become exposed to air and so that water pumps do not run dry. Typically this is done by hauling gallons of RO/DI filtered fresh water from...