For some context, my friend recently bought a pea puffer for his 5 gallon shrimp tank. He had told me he wanted a cool fish, plus he had a snail problem, so he decided to go off and buy a pea puffer. After it solved the snail problem, it started turning on his shrimp. now he is keeping it in an unheated fishbowl because, as it turns out he just wanted a disposable fish to solve the snail problem. he has been there for a while and I cant take him, so idk what to do with the little guy. any advice on what to do with him would be appreciated.