This acro has been growing well for me. Recently the skin has started to get bumpy. I tried to get a picture of it here. I have 2 small frags of this acro growing on a frag rack on the other side of the tank and they have smooth skin. Does anyone know what causes this? I also have about 5 frags of Oregon tort, and 2 of them have this bumpy skin while the other 3 do not.
Here is a picture from a month or so ago
Here is a picture from a month or so ago