Wilder if you're there, here's an update!
I added the Binox after a 25% water change last night. I'm amazed at how much better they're doing this morning, it's only been about 14 hours.
4 out of the 5 angels are foraging for food and happily swimming about the tank. The fifth is showing vast improvement hourly! The cottony stuff on their bodys is disapearing more and more every time I look.
I can't believe this worked so quickly. I do believe the melifix helped somewhat, perhaps from slowing down the progression of the disease until I got what they needed. I'm still sad that I lost 2 before I came here for your much needed advise.
I can do another treatment in 4 days after another 25% water change but it doesn't say I have to. If they look well, do you think I should do a second treatment in 4 days?
Unfortunately this product kills the good bacteria along with the bad stuff so my tank will cycle again. I'll probably be back for more info on how to cycle with fish. I'll also be getting a second, smaller tank for future problems.
Wilder I just have to say: Thank you, thank you, thank you!!!