Thats the thing though, 80 or 81 is not an elevated temperature. It might be higher than what you normaly run a tank at, but its not elevated in regards as to what this parasite finds suitable to live in. What you are most likely attributing to temperature is simply the fish developing a partial immunity to the parasite yet they will persist in your aquarium. Should your tank have a stress event, the fish can quickly lose that immunity and the ich hits them full force.
Experience means nothing if what you are observing leads you to the wrong conclusions. Learn the parasites life cycle and the biology behind what is actualy happening and I won't have to dispute you.
Chuck |