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
ATO / Dosing
Innovative Marine HydroFill Ti ATO Controller
Innovative Marine · $93
fits roughly 5-200 gallon systems
ATO / Dosing
Tom's Aquatics Aqua Lifter Dosing Pump (AW-20)
Tom's Aquatics · $25
fits roughly 1-120 gallon systems
ATO / Dosing
BRS 1.1mL Single Channel Dosing Pump
Bulk Reef Supply · $39
fits roughly 5-75 gallon systems
ATO / Dosing
IceCap Freshwater ATO Reservoir (5 Gallon)
IceCap · $127
fits roughly 20-150 gallon systems
ATO / Dosing
Innovative Marine HydroFill Ti ATO Water Pump
Innovative Marine · $93
fits roughly 5-200 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.