
Thank you for your reply
The best bet is a locally based fish group since you're in contact with others in the hobby straight away. You could try sites like Gumtree & Facebook marketplace. Selling the tank including the fish, can be more difficult. You may have to rehome the fish separately before you have any interest in your tank. I have found Maidenhead Aquatics will take fish, but for nothing in return. You could also have two separate listings for the tank and fish.
Best of luck![]()