One App. Every Aquarium.
Track your aquarium parameters, livestock, care tasks, dosing, water changes, and trends — all in one clean aquarium tracking app for reef, freshwater, planted, nano, and pico tanks.
Log. Learn. Grow.
iPhone beta access will be sent through TestFlight.
Built by an aquarium hobbyist. Currently in private beta.
Built for real aquarium keepers
Everything your tank needs, in one place.
Reef Theory replaces scattered notes, spreadsheets, and reminders with one premium aquarium maintenance app — a water parameter tracker and coral tracking app designed around how reef and freshwater keepers actually think.
Track Your Water
Log salinity, pH, alkalinity, nitrate, phosphate, temperature, and more. The water parameter tracker every reef tank and planted tank app needs.
Manage Livestock
Keep a living inventory of fish, coral, inverts, and plants. Built for both reef tank tracking and freshwater aquarium logs.
Stay Ahead of Care
Build routines for testing, feeding, dosing, water changes, and maintenance. The aquarium maintenance app that actually fits your schedule.
Built from inside the hobby.
Made by a keeper, for keepers.
Reef Theory started as a way to make aquarium keeping feel less scattered. Between testing water, tracking livestock, remembering maintenance, and watching tiny changes in a tank, hobbyists need something better than notes, spreadsheets, and random reminders.
This aquarium tracking app is being built by an aquarium keeper, for aquarium keepers — starting with the real problems we deal with every week.
Every ecosystem
Freshwater, planted, and reef — together.
Reef Theory isn't just a reef tank tracking app. It's a freshwater aquarium log and planted tank app built for every kind of aquarium — from a planted nano on a desk to a full-blown SPS reef.
Track your reef.
Track alkalinity, calcium, magnesium, salinity, nutrients, livestock, coral, and care routines — with future support for lighting, dosing, ATO, and controller integrations.
The App
Designed like an instrument.
Built for modern aquarium keeping — this reef tank tracking app and freshwater aquarium log is designed to make every ecosystem feel intuitive, immersive, and alive.
Onboarding
Choose your ecosystem. Start in seconds.
Tank Dashboard
Your entire ecosystem at a glance.
Parameter Tracking
Clean charts, beautifully rendered.
Product status
Now in beta. More coming soon.
Reef Theory is being built as a focused aquarium tracking app for reef and freshwater keepers. Here’s what you can test today — and what we’re building next.
Now in beta
- Tank dashboards
- Parameter logging
- Care tasks
- Livestock tracking
- Freshwater and saltwater support
Coming soon
- Automation integrations
- Dosing logs
- Advanced analytics
- Coral and plant libraries
- Community features
Private Beta
Help shape the future of aquarium keeping.
Reef Theory is still early, and beta testers will help shape the app before public launch. If you keep freshwater, planted, nano, or reef tanks, we'd love your feedback.