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Maintenance
Auto Top-Off (ATO)
A float-sensor system that automatically replenishes evaporated water - keeps salinity stable in reef aquariums.
Price: Mid
For: Saltwater $30-$300
📖 Overview
As saltwater evaporates, salt stays behind and salinity rises. Manual top-offs are error-prone (fluctuations of a few thousandths of specific gravity stress corals). An ATO senses the water level and adds RODI water automatically - keeping salinity dead stable 24/7.