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My fish are too big for my tanks. What size aquarium do I need?

Updated On September 23rd, 2025

Pet's info: Fish | Unknown - Fish | Male

I have a 26 gallon tank which have 1 adult Texas fish, 3 adult silver sharks and 2 small 3'' tiger Oscars. I have brought another tank of about 10 gallons which have only 1 loach in it. How can I arrange the fishes in between two tanks so that all can live without any problem.. kindly assist me. Thanking you, SRIJIT GHOSH

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on October 13th, 2017

All these fish can grow quite large. The loach would be the "smallest" at about 6 to 8 inches when full grown. The Oscars can reach lengths of 18 inches and the Texas cichlid and sharks can reach a foot in length. All these fish will require much larger tanks than the ones you have now. The three Oscars alone would do best in a 125 gallon aquarium MINIMUM. The others may thrive in 55 to 75 gallon tanks. To leave them in small tanks will cause stress, aggression and likely infection.

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