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ATO and Dosing checked by reef math.
ATO is often a stability purchase before it is a convenience purchase, especially on small tanks.
ATO / Dosing
Neptune Apex DOS Dosing & Fluid Metering System
Neptune Systems · $429
fits roughly 30-500 gallon systems
ATO / Dosing
Neptune Apex DOS QuietDrive Dosing Pump
Neptune Systems · $479
fits roughly 30-500 gallon systems
ATO / Dosing
Apex DOS & DDR Dosing Reservoir Bundle
Neptune Systems · $479
fits roughly 30-500 gallon systems
Professional buying context
- Manual top-off works until a busy week turns evaporation into a salinity spike.
- Check sensor redundancy, reservoir size, pump lift, fail-safes, and whether dosing is needed yet.
- Professional fit checks should validate the catalog value behind "smaller water volume + evaporation = faster salinity swing" against the actual tank dimensions, bioload, livestock goal, and maintenance cadence.