| if this is lymphocystis there is no treatment nor cure for it.but there is a bacterial or fungal infection that does highly resemble lymphocystis which can be cured with antibiotics also known as cotton I have treated this in the past with melafix or stronger antibiotics such as myricin .
the lymphocystis is more commonly found on the body of the fish more so than on the fins .and looks more like worts(coliflower) and cannot be removed in some cases it just goes away on is own and does not normally effect the fishes health in general.cotton on the hand if left untreated will spread and eventually lead to death | 
