Cherry Barb Stocking
Minimum 15 gal · 2" adult · low bioload · peaceful.
Estimated bioload
35%
understocked
Bioload-based: it weighs adult size and waste output, not the oversimplified "1 inch per gallon" rule.
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Keeping Cherry Barb
The Cherry Barb grows to about 2 inches and needs a minimum of 15 gallons. Its bioload is low, meaning it produces a small amount of waste for its size, a key factor the "one inch per gallon" rule ignores. It's a schooling species, so keep at least 6 together or they'll be stressed. Temperament is peaceful, making it a good community fish. Use the calculator above to see how a group fits your tank's real volume before you buy.
Before you add this species
- What bioload actually isWhy a low-waste fish counts ×1 per inch
- Cycle the tank firstFishless cycling, step by step
Tanks that clear the 15-gallon minimum
Real inside dimensions and filled weight for the standard sizes that can house a Cherry Barb.
- 20 gallon tank24" × 12" × 16"
- 29 gallon tank30" × 12" × 18"
- 40 gallon tank36" × 18" × 16"
Species to plan alongside the Cherry Barb
Closest on temperament and tank-size requirement. Run the whole list through the calculator before you buy: bioload adds up across species, not per species.
- Neon Tetra10 gal min · 1.5" adult · low bioload · peaceful
- Guppy10 gal min · 2" adult · low bioload · peaceful
- Southern Platy10 gal min · 2.5" adult · low bioload · peaceful
- Zebra Danio10 gal min · 2" adult · low bioload · peaceful
- Harlequin Rasbora10 gal min · 2" adult · low bioload · peaceful
- Glowlight Tetra10 gal min · 1.5" adult · low bioload · peaceful
Frequently asked questions
What size tank does a Cherry Barb need?
At least 15 gallons. They're a schooling fish, so keep a group of 6 or more.
Is the Cherry Barb peaceful?
Temperament is peaceful. Reaching about 2" as an adult with a low 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.