As mentioned, I am in the same boat. A couple of weeks ago, I took the angel out who really was very aggressive and hoped that would solve things...also did the selcon and made garlic food. But still progressing so the tang and sixline will go out tonight. The tang still acts and eats like a feind, but has what I would now consider a moderate case, and the wrasse shows no symptoms at all, but I am not willing to risk losing it...I'd just find that hard to justify to myself. BUT all the while I am looking for any additional stress because I do believe that it is a big contribution to this disease.
This is a slight hijack (nonetheless ick related) but I am hoping Scubadoo will be here again (or anyone else with experience in this). Does anyone have a RANGE of reasonable, if you will, stray voltage in a tank? I did this last night and came up with about 1.2V. A RIO pump and another powerhead were the main contributers so I removed them (which meant using my skimmer MAG7 as my return --> no skimmer at the mo) and am at .5 or so....this is much less than some other reports I've seen. Personally, I am not willing to ignore the stray voltage idea though several people would say it is not an issue. But several things: one is no real range (probably due to no real studies) of OK values. Another is the polar opposite views on ground probes. One is that they are beneficial and every tank should have them, the other is that not only are they NOT needed but are dangerous and would turn a non-issue into a big one. I was reading Fenner and I think there was something on not really agreeing with the hype on stray voltage but then in another area also saying it probably wasn't good. AAAHHHHHHHHHHH!!!!!!!!!!!!!!!!!! Which is about where I was last night. I'll be posting a thread dredging for experiences in the Reef section but wanted to fire some "buck shot' at this frustrating problem.