55 Gallon Aquarium Stocking Calculator
The 55 gallon is the benchmark size for showpiece planted displays and community tanks. Large enough for schooling fish, centerpiece cichlids, and a full planted layout — use this calculator to make sure your bioload stays balanced.
Aquarium Stocking Calculator
Calculate bioload, check compatibility, and plan the perfect stocking for your tank.
Add your tank & fish
Your stocking score will appear here once you enter tank details and add some stock.
Aquarium Type
Tank Dimensions & Volume
Calculated: 56.7 gal (214.6 L)
Filtration & Setup
Oversized filtration adds bonus capacity.
Tank Age
Older tanks tolerate higher bioloads.
Stocking
Stock List
Popular species:
Search for fish, shrimp, corals and more to build your stocking list.
Save your stocking plans
Create a free account to track your tanks, log water parameters, and build your dream stocking list.
Hey! I'm Finn 🐟 Tell me what you're going for — like "a peaceful 20 gallon community" or "betta paradise tank" — and I'll set everything up for you. You can also ask me to analyze your plan once you've filled it in.
Popular stocking ideas for your 55 Gallon tank
🏆 55 Gallon Planted Display
A showpiece planted tank with a large rummy nose school and active bottom crew.