I'm currently cycling a 20 gallon tank as a present for my boyfriend. He really wants a betta and some ADFs, so I had planned to put in 1 betta and 3 ADFs. I also really want to put in some snails for clean up. I was thinking nerites. I was also thinking about putting some kind of shrimp in the tank. My question is how much can I stock a 20 gallon? Is the betta plus ADFs plus snails plus shrimp too much?? How many snails should I do? How many shrimp and what kind are compatible with ADFs and bettas? Any advice is appreciated!!