My balloon molly has balancing issues and can't swim properly HELP?!?

Your fish has SBS (swim bladder syndrome), it's caused by overfeeding. Fast your fish for 2 days, this will ist in the undigested foods. After 2 days, if the fish is still swimming funny, then give it the inside of a blanched pea, this is also to help in furthering isting digestions of the foods, he should be fine in a day or 2 after he eats the pea.