Aquarium Calculators
Most of fishkeeping is keeping the water stable. Size a filter or heater for your tank, check how many fish the tank can carry and see which species get along.
4 aquarium tools
Aquarium Filter Size Calculator
Enter your tank size and fish load to get the filter flow rate you need in litres and gallons per hour, with the turnover rate.
Aquarium Heater Size Calculator
Enter tank size, room temperature and target water temperature to see how many watts your aquarium heater needs.
Aquarium Stocking Level Calculator
Enter tank volume, filtration and fish type to estimate the bioload capacity and how many fish your aquarium can hold.
Fish Compatibility Checker
Pick two aquarium fish, such as betta, guppy, tetra or angelfish, and get a compatibility score from 0 to 100 with an assessment.