Free tools
Aquarium tools & calculators
Practical, no-signup tools that do the maths for you — so every dose and water change starts from the right number. More are on the way.
Live
Aquarium volume calculator
Your tank's real water volume — after glass, substrate and decor — plus salt, medication-dose and water-change modes.
Open →Coming soon
Symptom triage checker
Answer a few questions about what you're seeing and get the likely causes, ranked — with a 'test your water first' branch.
Coming soon
Quarantine & treatment timer
Track quarantine and treatment windows so you know when to redose and when it's safe to move fish back.
Coming soon
Stocking checker
See whether your stocking plan fits your tank and which species get along.