Two of my fishes has developed blood red patches on their bodies.
One of them ( a neon rainbowfish) has a red lump coming out of the left gills while the other (a fat-belly molly) have a red patch on its head(looks like a koi now)....

Anyone know what diseases are these and how to cure them? Thanks. I had checked water parameters with optimal conditions (7 ph , 29 degree temp , 0 ammonia )