About Aquarium Planner
Aquarium Planner is a free, beginner-friendly reference for checking whether freshwater fish have compatible care needs. It was made for people just starting out in fishkeeping.
Who runs it
Aquarium Planner is built and run by an individual developer. Its purpose is to help you compare basic care needs before adding fish to an aquarium.
How results are made
Each fish profile lists recommended temperature, pH, water hardness, group size, minimum tank size, and temperament. The planner compares these ranges, shows the conditions your fish share, flags behavior risks, and gives a rough space hint.
Read the full compatibility guide
Guidance, not a guarantee
Results are a starting point. Individual fish, water quality, filtration, and tank setup can change how well fish get along. Observe new fish after introducing them, and consult a qualified professional about health concerns.
Your data
Your aquarium settings and selected fish are saved only in this browser using localStorage. They are not sent to us.
Contact
For questions or data corrections, please see our contact page.