My apologies, Protean. I was not around here much last week and must have missed your earlier posts.

Interpet seems to only be available in the UK and Europe.
If your oto had ich did you treat him separately? If so, the tank still has ich. The parasite often colonizes the gills first and you won't see it on the body. Rapid respiration is a signal symptom of ich. Fish that are stressed by parasites often succumb to secondary infections. My thinking is that you may still be harboring ich in your tank.
Did you treat the whole tank for ich or only the oto, and what did you do for treatment?
I have some around 11 corys, 4 otos, and new addition of 4 clowns. One of the otos has developed ick. he has around 3 to 4 of ick on his body. One of the corys has it to , I just noticed it right now. Should I treat the hole tank also? . Its a planted tank. Should expect a full out break. Please let me know to reduced and out break. I already did a 20% water change, I gravel cleaned it too. I added Melafix and pimafix to fight some type of fungus that one of the cory has. Thanks in advance. I have an empty 10gal tank, but its in the attic. What type of ick treatment would you guys and gals recommend?
It sounds like you may have brought the ich in with the clowns. At 79F it could take up to a week or more for the ich to go through a full life cycle. Raising the temp speeds up this process but you need to be prepared to treat the tank when you raise the temp or all that happens is you end up with rapidly proliferating ich.
The maracyn may help with any secondary infections, but if there is ich in the tank, that is the first thing you should deal with. Unfortunately, you should finish the course with the maracyn to avoid developing antibiotic resistant strains of bacteria, but you still need to deal with the ich - if that's what it is.
Melafix and Pimafix won't help with ich at all. In fact, I don't recommend pimafix for loaches.
Some questions:
Did you ever notice any fish 'flashing'?
Can you give me a list of all the fish affected and what you see in them?
Ideally, a picture would be very helpful, especially of the cory with fungus if she/he is still with you.
Again, I am sorry for your losses and that I didn't get back to you on this sooner.
shari