The blue betta, i noticed today had a really swollen eye, almost like a bubble. and yesterday my pink betta had a huge lump on it. Could this possibly be to changing different types of food? I usually feed blood worms, and sometimes brine shrimp, rarely omega super color flakes, but i have been out of blood worms, and have been feeding them planktin and fish flakes, and brine shrimp. also, there is baby mollies in this tank aswell in a fry net in the corner. thanks
Also, i used to have carbon and a black sponge in the back of my hang on the back filter, now i removed the carbon last week and shoved some bio media in there, could this have anything to do with it?