Does anyone know what these growths are all over my platy? He's about 5 months old and was born in a tank that hadn't cycled yet (I didn't know about the cycle at the time) and he's always been a little stunted and slow. Is it contagious? Is it treatable? I have metro plex, API general cure, and some other medicine but I don't know what to use. He's is currently with three ghost shrimp and two nerite snails but I could move him to an empty 5 gallon with a sponge filter if needed. Thank you for any advice.