| Sorry to be driving you crazy but with this picture I'm now wondering also about anchor worm? Do you ever see tiny white splinters sticking out of these spots? Of the three possibilities, I'm going to move ich into last place.
This is why a microscope would be so helpful. If this were ich present we could easily see them on a slide as a large rolling dark blob with a very identifiable internal content.
If this were carp pox I would expect the warm water to cause it to disappear but stress will keep this herpes active so the 20 gallon tank would work against you as would the water quality issues.
In the future I would look into getting a rubber maid tub for these three fish with a nice filter system accumulated over time.
In light of all we have discussed, I would honestly recommend larger quarters and a very stable clean environment first and treatment second. And would definitely spend the extra money for meds and move these fish back to the 55 gallon now. JR |