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Best tropical fish for a 20-gallon tank? Can I donate fish to Petco?

Updated On September 23rd, 2025

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

I’m getting a 20 gallln tank and I would like to know what are the best tropical freshwater fish that I could get? I would like to get a pleco, but he would get to big for my tank, so I’m wondering if I could donate him to my locomotive petco in The Dalles Oregon? Thank you I love Petco Pet Education Center!!!

1 Answer

Most Helpful Answer

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Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on August 12th, 2018

Platys, Mollies, Neons, Dwarf Gouramis and Cory Cats are all excellent choices. Be sure to not overstock the tank and allow it to properly cycle before adding fish. You would need to contact the Petco in question and ask them directly. Some locations will accept fish to rehome if they have the tank space. Most local fish stores will not, due to risk of disease or parasite transmission.

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