Angelfish Stocking
Minimum 30 gal · 6" adult · medium bioload · semi-aggressive.
Estimated bioload
204%
overstocked
Bioload-based: it weighs adult size and waste output, not the oversimplified "1 inch per gallon" rule.
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Keeping Angelfish
The Angelfish grows to about 6 inches and needs a minimum of 30 gallons. Its bioload is medium, meaning it produces a moderate amount of waste for its size, a key factor the "one inch per gallon" rule ignores. It doesn't need a large group, but plan tankmates around its temperament. Temperament is semi-aggressive, so avoid slow or long-finned tankmates. Use the calculator above to see how a group fits your tank's real volume before you buy.
Frequently asked questions
What size tank does a Angelfish need?
At least 30 gallons. They can be kept without a large group, but check tankmate compatibility.
Is the Angelfish peaceful?
Temperament is semi-aggressive. Reaching about 6" as an adult with a medium bioload, plan tankmates and filtration accordingly.
Keep going with the same pet
Not sure of your tank's exact gallons? Measure it with the aquarium volume calculator first.
Your dog's age in human years, breed-size adjusted, not the ×7 myth.
Your cat's age in human years using the real feline curve, not the ×7 myth.
How much to feed: daily calories and cups by weight, activity and life stage.
Tank gallons and liters from your dimensions: rectangle, cylinder, hex and more.