I have a 30L planted aquarium with some ember tetras and red cherry shrimp and a Nerite snail.
I have noticed that one of my ember tetras has developed some strange white marks on its side, I have attached an image URL of the marks, not the best quality as taken on an iPhone on full zoom. It doesn't look like ICH as it is only on its body and not on the fins.
Has anyone got any ideas what it could be and any safe treatments if required that are safe with invertebrates. If need be I should have enough equipment to set up a hospital tank.