Serygo, one of my (6) 7-9" terns has the same thing you are describing. They are small nodules about 1mm in diameter on the tail, dorsal and now anal fin. Mine are not white but rather beige in color. I beleive the cause was due to lack of filtration (one of my eheims stopped pumping and a small amount of food was left in the tank). I have been treating this for about 1-week with AP's (Aquarium Pharmacueticals) "AquariSol". It is a copper-salt based solution designed for external parasitic infestations such as Ich, and velvet.Serygo said:oya and no rich mine do not look like that.
if anyone has seen a cichlid with kind of a bunch of little gold looking spots on their anal and back fin. My pirayas look like that but the white version...
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I have not used this chemical before so I am moving cautiously. I just completed my second treatment after a 35% water change (and I fixed the filter). The fish don't seem to mind this chemical at all. I am also raising the temp from 78 to 82 over the next few days. I am hoping this will speed up the cycle of this parasite and kill it when it leaves the fish. If the fish does not show signs of improvement by Monday (01/31/05), I will pull it from the main tank and place it in my hospital tank. There I will hit it with something else such as formalin or Clout. These chemicals kick butt, but you have to be careful. I will post again later.