OrcaTank

Your aquarium,
on autopilot.

OrcaTank is a self-contained aquarium controller. Lights, filter, heater and air on smart schedules β€” with temperature, light and leak sensing watching over your fish. No cloud. No subscriptions. It lives on your tank and you open it in a browser.

Explore features How it works
The hardware

A quiet octagon on the glass.

OrcaTank controller β€” matte black octagonal pod with a machined quick-connect probe cable
Machined shell Β· quick-connect probe lead
OrcaTank mounted on the glass of a planted aquarium with neon tetras
Lives right on the tank β€” sensors where they belong
Everything a tank needs

One little box. The whole aquarium.

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Four smart sockets

Filter, light, heater, air pump β€” each on its own program: timers, duty cycles or a real thermostat. Manual overrides last exactly until the next scheduled change.

🌑️

Knows its temperatures

Two waterproof probes in the tank, air temperature and humidity in the room, live outdoor weather on the dashboard β€” with 7 days of charted history.

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Safe zones

Set low and high limits for water temperature and light. The moment your tank drifts out of its comfort zone, the dashboard turns amber and tells you why.

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Leak protection

A probe on the floor detects water where it shouldn't be β€” and instantly switches off the sockets you've flagged, before the heater cooks itself dry.

πŸ“…

Care schedules

Feeding, fertilizing, water changes β€” on a schedule with gentle reminders, dose logging and a 14-day care score. Plus a living inventory of your fish and plants.

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No cloud, ever

Everything runs on the device. Your data stays on your tank, it works with the internet down, and firmware updates arrive over WiFi when you tap the button.

See it live

This is the actual dashboard.

The complete OrcaTank web dashboard of a real running tank, top to bottom β€” temperatures, history chart, socket activity and cards, care schedule and planner, care score, fish and plants inventory, and system tiles

Not a mockup β€” captured live from a running tank, fish and all. The entire app in one scroll: temperatures and weather, a week of charts, socket timelines and controls, the care planner, feeding score and even the fish themselves. Tap it for full resolution.

Setup in minutes

Three steps to autopilot

Plug in the sockets

OrcaTank broadcasts its own WiFi just for its four smart sockets β€” they pair automatically, no router configuration needed.

Drop in the probes

Temperature probes into the water, leak probe on the floor, light sensor by the tank. Sensors are detected the moment you connect them.

Open your browser

Visit orcatank.local from any phone or laptop on your home WiFi. Name your tank, set the schedules, done β€” it runs itself from here.

Under the hood

Honest hardware

Annotated diagram of the OrcaTank controller: two water temperature probes, leak sensor, light sensor, air temperature and humidity, quick button, status LED, ESP32-S3 inside β€” with four smart sockets, web dashboard, no cloud and OTA updates
runs 4 sockets on smart programs keeps the water at your temperature notices a burnt-out light knows the room climate cuts power the moment it detects a leak remembers a week of everything updates itself over WiFi happily runs several tanks keeps working without internet

Built by an aquarist,
for quiet, healthy tanks.

Open hardware spirit, no accounts, no lock-in β€” just a calm dashboard and fish that thrive.

See what it does