If you are looking to make a little money or ensure your fish goes to a specific kind of home, Petco may not be your best bet. Consider these options instead: Petco and Petsmart buy fish from you or give store credit?
Surrendered fish are often placed in a separate "adoption tank" and re-homed to new owners for a very small fee (often around $1).
Not every store has the tank space to take in surrenders. Always call your local store first to see if they can accommodate your fish. Better Alternatives for Selling Your Fish
Petco does not buy fish from individuals or local breeders. They work with large, corporate-approved wholesale vendors and cannot legally or logistically pay you for your fish—even if they are high-quality or rare. Can You Trade or Get Store Credit?
If you recently bought a fish from Petco and it isn't working out (or it unfortunately passed away), you can return it within 30 days for a refund or exchange, provided you have your receipt. Freshwater: Typically covered by a 30-day life guarantee.
