Controllers
A3 Apex Aquarium Controller System
Neptune Systems · $799
fits roughly 55-500 gallon systems
Controllers and Monitoring checked by reef math.
A controller is useful when it reduces a real risk in the build, not when it replaces basic husbandry.
Controllers
Apex Trident Auto Water Tester (Ca/Alk/Mg)
Neptune Systems · $899
fits roughly 55-500 gallon systems
Controllers
Focustronic Alkatronic Alkalinity Controller
Focustronic · $990
best for systems 20 gallons and up
Controllers
Hanna Instruments HI736 Marine Phosphorus Ultra Low Range (ppb) Checker HC
Hanna Instruments · $75
best for systems 5 gallons and up
Controllers
Hanna Instruments HI758 Marine Calcium Checker HC
Hanna Instruments · $75
best for systems 5 gallons and up
Controllers
Hanna Instruments HI772 Marine Alkalinity (dKH) Checker HC
Hanna Instruments · $75
best for systems 5 gallons and up
Controllers
Hanna Instruments HI774 Marine Phosphate Ultra Low Range (ppm) Checker HC
Hanna Instruments · $75
best for systems 5 gallons and up
Controllers
Hydros XP8 Energy Bar Aquarium Controller
CoralVue · $229
best for systems 30 gallons and up
Controllers
Inkbird ITC-308 WiFi Temperature Controller
Inkbird · $55
best for systems 5 gallons and up
Controllers
Inkbird ITC-308S Dual Stage Temperature Controller
Inkbird · $39
best for systems 5 gallons and up
Controllers
Milwaukee MA887 Digital Seawater Refractometer
Milwaukee Instruments · $155
best for systems 5 gallons and up
Controllers
American Marine Pinpoint pH Monitor
American Marine · $129
best for systems 5 gallons and up
Controllers
American Marine Pinpoint Salinity Monitor
American Marine · $179
best for systems 5 gallons and up
Controllers
Apex System with Trident Bundle
Neptune Systems · $1,499
fits roughly 55-500 gallon systems
Controllers
Focustronic Dosetronic DC 5-Channel Dosing Pump
Focustronic · $549
best for systems 20 gallons and up
Controllers
Focustronic Mastertronic Automated Water Tester
Focustronic · $910
best for systems 20 gallons and up
Controllers
Hanna Instruments HI755 Marine Alkalinity (ppm) Checker HC
Hanna Instruments · $75
best for systems 5 gallons and up
Controllers
Hanna Instruments HI781 Marine Nitrate Low Range Checker HC
Hanna Instruments · $75
best for systems 5 gallons and up
Controllers
Hydros WaveEngine LE Dual Pump Controller
CoralVue · $169
fits roughly 20-300 gallon systems
Controllers
Inkbird ITC-306a WiFi Aquarium Heater Controller
Inkbird · $69
best for systems 5 gallons and up
Controllers
Neptune Systems Apex FMM Fluid Monitoring Module
Neptune Systems · $150
best for systems 20 gallons and up
Controllers
Reef Factory Smart Tester Automated Testing Device
Reef Factory · $613
best for systems 20 gallons and up
Controllers
American Marine Pinpoint ORP Monitor
American Marine · $129
best for systems 30 gallons and up
Controllers
American Marine Pinpoint pH Controller
American Marine · $199
best for systems 30 gallons and up
Controllers
Apex Classic Controller with Lab-Grade pH Probe
Neptune Systems · $399
fits roughly 30-300 gallon systems
Controllers
Milwaukee MW100 Portable pH Meter
Milwaukee Instruments · $153
best for systems 5 gallons and up
Professional buying context
- Automation can add complexity if the basic heater, ATO, and maintenance plan are not already stable.
- Check probe support, controllable outlets, alerting, redundancy, and setup complexity.
- Professional fit checks should validate the catalog value behind "controller value = monitored risk + reliable alert + controlled response" against the actual tank dimensions, bioload, livestock goal, and maintenance cadence.