Our devices
Built for reef keepers, by reef keepers.
Every Nereus device speaks the same language — your dashboard.
The brain of your reef.
Reef Controller
Continuously monitors pH, temperature and a third digital sensor input. Streams live data straight to the Nereus dashboard, and pushes instant notifications the moment a parameter drifts out of range.
- ›Live pH, temperature & digital sensor readings
- ›Real-time charts on the dashboard
- ›Out-of-range push notifications for pH & temperature
- ›Add manual test values (Alk, NO₃, PO₄, Mg, Ca…)
Precision dosing, fully automated.
Dual-Head Doser
Two independent heads with smart scheduling. Set a daily volume and Nereus splits it into multiple micro-doses across the day for stable parameters.
- ›Schedule daily volume — auto-split into slots
- ›Periodic & 24h total dosing charts
- ›Reservoir level tracking
- ›Push notifications on low reservoir
Three sensors. Zero worries.
ATO System
Two sump-mounted sensors maintain the perfect water level by automatically triggering the top-off pump. A third sensor watches your reservoir and alerts you before it runs dry.
- ›Dual sump sensors for redundant level control
- ›Automatic top-off pump trigger
- ›Reservoir low-level alert
- ›Failsafe protection logic
Lab-grade alkalinity, in minutes.
Alkalinity Checker
A dedicated colorimetric tester for alkalinity — similar workflow to the Hanna checker, with results that flow directly into your Nereus dashboard charts.
- ›Fast colorimetric measurement
- ›Repeatable, lab-grade accuracy
- ›Auto-logged into dashboard trends
- ›Pairs with reef controller data
One dashboard
Every parameter, every device — in one place.
Live pH and temperature curves, alkalinity history, doser totals, reservoir status, and your manual test entries — all charted side-by-side so you can read what your reef is telling you. The reef controller pings your phone the instant pH or temperature crosses your safe range.
