Planning, stocking, water chemistry, filtration, maintenance and history — one app instead of six tabs, a forum thread and a guess. Every tool in Aquabuildr does one of four jobs.
Every species carries a researched list of the species it can live with. Add a fish and Aquabuildr intersects that list against everything already swimming — so your options shrink, correctly, as the tank fills up.
Never overstock your tank again. The Size Filter automatically hides fish that need more space than you have left, and the capacity bar changes colour as the tank fills.
Turn on the step-by-step guide and Aquabuildr walks you from "I want a fish tank" to a cycled, stocked aquarium — where to put it, whether your stand can hold it, what to buy, and the three weeks of patience nobody warns you about. Saltwater gets eleven steps.
Every tank gets a live health score built from the things that actually kill fish: ammonia, nitrite, nitrate, pH, and whether you are keeping up with your own water-change schedule. It drifts down gently when you fall behind and recovers quickly when you catch up.
Fourteen water parameters, from ammonia and pH through to calcium, magnesium and salinity. Pick the three you want on your dashboard, log the rest as you test them, and watch them graph over time. Set your water-change rhythm once and Aquabuildr tracks how close you are to due.
Built by aquarists, not marketing.
Every aquarium is different. That's why we analyze your tank's bioload, fish, feeding, maintenance, and setup instead of relying on generic tank-size ratings. The result is a filtration recommendation tailored specifically to your aquarium.
Filter manufacturers rate their filters under ideal laboratory conditions. Aquabuildr uses real-world conditions instead. By considering your fish, stocking level, feeding habits, maintenance routine, and aquarium setup, we recommend the filter that will actually keep your water clean — not just circulate it.
A proper question-and-answer community built for aquariums. Ask with photos, get answers you can vote on, and mark the one that actually solved it. Link a question to one of your tanks and anyone answering can see what they're dealing with.
Ask anything — why your water went cloudy, whether two species will get along, how long to wait before adding fish. Aquabot answers in plain language, and your conversations are saved so you can come back to them.
Photograph an individual fish over months and keep the whole timeline in one place — growth, health, condition. Post an update in seconds, browse it as a grid or a story, and see the latest shot of every fish right in your inhabitants list.
Aquabuildr logs 27 kinds of tank activity automatically — every parameter, dose, fish added, water change and note. Graph any of it, filter it, and take it with you as CSV or Excel whenever you want.
Share a tank, follow the hobbyists whose work you like, and browse Explore for builds you'd never have thought of. Tap through to see exactly what's in a tank you admire — the stocking, the equipment, the parameters they hold.
Curated gear matched to your actual tank — its size and dimensions, its water type, and the specific fish, substrate and equipment already in it. No generic bestseller list.
Product links go to Amazon. Aquabuildr may earn a commission on qualifying purchases — this does not affect what we recommend. [Disclosure wording pending legal sign-off.]
"Always purchase coral from accredited, sustainable dealers. Choose aquacultured or farmed specimens to protect wild reefs and avoid harming natural ecosystems. Never buy corals collected from the ocean."
See the Accredited Vendor programme