Hey Drizzle,
No fun, huh? I'm still battling it, but losing the war. My 3 head torch died, my single Indo gold torch died (the two I posted pics of), and my 2 head Cristata died. :-( It didn't help that I had a week+ vacation and they got worse when I couldn't treat them for 10 days or so. I have 3 torches left, all showing some symptoms / irritation. The one that was the healthiest now looks the worst, so this isn't going well. I also have a hammer that looks like it isn't going to make it. My frogspawn has seemed a little irritated, but it's the only euphyllia that's doing well overall. I'm afraid that nothing is going to save them, but I'm still trying.
I've been doing dips with PolypLab Reef Primer (which is just potassium salts - and overpriced IMO) for 5 minutes, then Iodine + Coral RX for 10 minutes. I do them about every 4 days, going from the first dip directly to the next.
I had wondered if the lack of NO3 and PO4 (both at 0 in my tank) were an issue, so I've been trying to raise them and started dosing nitrate and phosphate (Brightwell NeoNitro and NeoPhos) as well as Brightwell amino acids and Pohl's Coral Vitalizer. Started all of them several weeks ago. No luck so far.
Did you see anything positive from the melafix? I haven't tried that yet.
Feels like I'm throwing everything at this problem (what else can you do when nobody seems to understand the issue/fix?), but nothing seems to work. :-(
BTW, all other corals (SPS, zoas and other softies, plate, scoly, acans, blasts, lots of chalices, etc) seem to be unaffected. Good luck. Keep me posted if you find something that shows some positive results and I'll do the same. Thanks,
--Kyle