Stocking Calculator
Calculate how many fish you can safely keep in your tank based on the "inch per gallon" rule, adjusted for your experience level.
Tank Information
Conservative stocking for beginners
Fish Stock
Stocking Level
0.0"Total Fish Length
20.0"Recommended Max
0%Stocking Level
Compatibility Checker
Select up to 5 fish species to see if they'll coexist peacefully in your aquarium. Get instant compatibility warnings and recommendations.
Select Fish to Compare (max 5)
Click on fish to add them to your tank
More Tools Coming Soon
We're working on additional calculators and tools to help you maintain a healthy aquarium.
Water Parameter Converter
Convert between temperature units (°F/°C) and water hardness measurements (dGH/ppm)