While I agree with what
Stephen St.Clair
said about some fish will work, and some won't, regarding total numbers, I don't consider juvenile fish being together, a success story. Keep a tank of adult all males together for several years, and you will often find that even after a few years of being together males being males things can change overnight. It seems to be a common theme on forums, youtube etc, where people have success for several months, or even a year or two, and they consider it a long term community success story. It seldom ends that way once all the fish become sexually mature - no matter the species, or community being shown in pics, or video.
The difficult part about this story is the OP has already stated that where he lives rehoming fish is difficult, hence his current dilemma with his clown loaches.
The difficult part about this story is the OP has already stated that where he lives rehoming fish is difficult, hence his current dilemma with his clown loaches.