Aquarium Tank Planner

Aquarium Tank Planner: Find the Right Fish Tank Size

Estimate a practical aquarium size from fish species, fish count, feeding type, swimming-space needs, and biological load — then explore example tanks that fit the recommended volume.

Estimate swimming spaceUse fish adult size, activity, and territorial behavior to estimate swimming-space needs.
Estimate bioloadUse fish size, count, and feeding type to estimate water-quality pressure.
Show example tanksHighlight example aquarium tanks and kits that match the recommended volume range.

What This Aquarium Tank Planner Does

This tool helps you choose a tank size before comparing aquarium tanks or starter kits.

Estimate swimming space

Use fish adult size, activity, and territorial behavior to estimate swimming-space needs.

Estimate bioload

Use fish size, count, and feeding type to estimate water-quality pressure.

Recommend tank volume

Choose the larger requirement between swimming space and bioload stability.

Show example tanks

Highlight example aquarium tanks and kits that match the recommended volume range.

Build Your Aquarium Tank Plan

Enter the fish you plan to keep. The planner estimates a minimum tank volume and a shopping target size.

How to Use Your Aquarium Tank Plan

When volume matters most

Prioritize the recommended tank volume for messy fish, territorial fish, or setups with heavy biological load.

When tank shape matters

Active schooling fish usually benefit from a longer tank, while aquascaping setups often favor clear, rimless rectangular tanks.

When starter kits make sense

Starter kits are convenient for beginners, but the included filter or light may still need upgrading later.