In public beta
Build your own reef controller.
Same control, lower cost.
With about €120 in components and step-by-step guides, Joy Reef helps you build a DIY controller for sensors, smart plugs, automations and monitoring of your marine tank.
Everything in one dashboard
Same page on phone and laptop. No app to install.
Sensors, plugs, automations — all in one place
Sensors
- Temperature (DS18B20)
- pH with 2-point calibration
- Up to 4 float switches
Smart plugs
- Off-the-shelf Tasmota plugs
- Lights, heaters, pumps, skimmer
- Pre-assembled doser boards
Automations
- Automatic ATO with safety
- Scheduled water changes
- KH titration
- Critical temperature alerts
Track your tank over time
Value journal and AI Advice: understand what's really happening.
Value journal
Track every parameter. Upload photos. See the trend.
- Record KH, Ca, Mg, NO₃, PO₄, pH and any custom parameter
- Upload photos of your tank with each measurement
- Historical charts for every parameter
- Compare different periods and spot trends
AI Advice
Personalised analysis based on your data. No generic tips.
- Analyses your parameters and uploaded photos
- Takes your tank type and equipment into account
- Suggests specific corrections and changes to monitor
- Supports Claude (Anthropic), GPT-4 (OpenAI) and Gemini
Online in a weekend
Three steps to start.
Buy the components
About 120 € list — ESP8266, temperature/pH sensors, relays, power supply.
See shopping listBuild the controller
Schematics and photos in the guide. No mandatory soldering — a screw-shield board is enough.
See build guideTurn it on and sign up
The controller creates a temporary WiFi for setup. From there it talks to the portal.
All guidesReady to see your tank from any phone?
No card required. No download.
