Long post, sorry. I recently made a thread asking about little “pimples” on my ranchu’s head, and the consensus was that he had early stages of hole-in-head (here’s a picture): Anyway, assuming that it is hole-in-head, I ordered a medication for him and it will be arriving today. But since hole-in-head has multiple causes, I’m just really curious about if I’m doing everything right for him. He lives in a 55 gallon tank with 3 other fancies and 2 plecos (the plecos will be moved to a bigger tank eventually). Ammonia: 0 Nitrate: 0 Nitrite: 5-10 I do weekly 25-50% water changes. I treat the water with a single dose of Stresscoat to remove chlorine, but I doubled it when I saw the pimples to promote healing. I have doubled filtration to keep the water clean, both Tetra HOB filters. I feed Wardly pellets as a staple diet. For treats, typically about once a week, I give bloodworms, brine shrimp, or mysis shrimp. Now and then I will give them some goldfish “granules” that I got from a friend, which are basically the same as the pellets but smaller. I supplement their diets mostly with lettuce and cucumber. Occasionally they get treats like orange slices and watermelon. Does all of this sound okay? Is there something I’m missing, or is the cause definitely parasites? I don’t want to treat with the medication and then find out it’s something I was doing wrong in his diet or water quality. Thanks in advance!