I currently have a 7.5 gal tank with a male crowntail Betta and one (yellow) mystery snail. My betta is very well tempered, btw. I was hoping to add something else to the tank, if I could. But I'm not sure what would be best or how many of them. Here's what I'm thinking about: Another mystery snail (a different color hopefully or will they get along better if they're the same?) 2 African Dwarf Frogs Any kind of shrimp Kuhli Loach And I'm open to any other suggestions! I wanted something a bit unique and something that doesnt really need a large group/school to be happy.