Coralline, Aquarium Parameter Tracking
What your reef has been missing.
Built by a reefer for every tank.
Coralline is a free aquarium parameter tracking app for reef and freshwater hobbyists. Log your water tests, visualize trends with interactive charts, and keep tabs on your livestock, all in one place. No hardware lock-in. Your data, your way.
Everything You Need
Parameter Tracking
Log calcium, alkalinity, pH, and all the parameters that matter. Saltwater and freshwater presets with customizable options.
Visual Charts
See trends at a glance with interactive time-series charts. Ideal range overlays show you exactly where your water stands.
Livestock Management
Track your fish, corals, and invertebrates with photos, notes, and care records. Archive history when things change.
Offline Ready
Log tests even without internet. Your data syncs automatically when you reconnect. Take your phone to the fish room without worrying about signal.
See It In Action
Built for the Reef Community
I started Coralline because I was tired of tracking my reef tank parameters in a spreadsheet. I've been keeping saltwater tanks for years, and every solution I tried was either too clunky, locked to specific hardware, or missing basic features that any reefer would expect. So I decided to build the app I actually wanted to use.
Coralline is designed from the ground up for the way aquarists actually work. It supports every test kit, works offline when you're in the fish room, and keeps your data portable. No vendor lock-in, no proprietary hardware requirements. Just a clean, focused tool for tracking what matters.
The app is currently in beta development, and I'm looking for fellow hobbyists to help shape what comes next. If you've ever wished your parameter tracking was better, I'd love to hear from you.
Jason, Reef Dev, LLC