In my 33g in my livingroom I have 2 - pleco's , 1 - dojo loach, 3 - goldfish, 1 - blue gourami, 1- angel, 3 - blood parrots, 4 - silver dollars, and a electric blue lobster. I find that the smallest female dollar keeps getting what appears to be swim bladder.....then it just goes away. Could the other fish be swimming into her or something causing these swim bladder-like conditions???