Vet Q & ABest tropical fish for a 20-gallon tank? Can I donate fish to Petco?
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.
Updated on September 24th, 2025