Catfish Tank Size Calculator

What is the Catfish Tank Size Calculator?

The Catfish Tank Size Calculator recommends minimum tank size in liters or gallons for keeping catfish. Undersized housing is one of the most common and most fixable welfare problems in pet keeping, it affects everything from stress levels to exercise to litter/waste management.

A well-cared-for catfish usually lives somewhere between 5 and 15 years. Diet-wise they are an omnivore, which shapes almost every feeding decision you make. Aquarium catfish range from 4cm corydoras to species over a meter, so confirm adult size before buying. Most are bottom-dwellers needing smooth substrate to protect their barbels and their own sinking food. Keep an eye out for barbel erosion from sharp gravel, starvation when assumed to be scavengers, ich. These are the conditions catfish are most commonly seen for.

How does the Catfish Tank Size Calculator work?

The recommendation is based on published care-guide minimums for catfish, scaled to the animal's current or expected adult size. Treat the result as a well-founded estimate. Every catfish is an individual, and your vet's judgement outranks any online tool.

What changes the answer

• Adult size: housing should be sized for the animal's full-grown dimensions, not its current size if still young
• Number of animals being housed together, since space needs don't simply divide evenly
• Activity level and natural behavior, such as climbing, digging or swimming space
• Whether the space is temporary (travel/carrier) or permanent (everyday housing)

How do you use the Catfish Tank Size Calculator?

1. Enter the adult body length in whichever unit you use (in, ft, cm)
2. Answer "How many of this species?"
3. Pick your filtration and planting (Standard filter, no live plants, Strong filter or heavily planted, Minimal filtration)
4. Press Calculate, then read the result alongside the sources listed below

Worth doing: jot down the date and the result each time. A single number tells you little, but a trend across a few months tells you a lot about your catfish.

For related questions, see the other housing tools or browse every catfish tool.

Before you rely on this

Two catfish with identical numbers on paper can still need different care. Breed or line, body condition, activity level and any existing health conditions all pull the real answer away from the average. If your catfish has a diagnosed condition, is pregnant, or is very young or very old, treat the figure here as the loosest of guides and let your vet set the actual target.