In almost all cases if you'll keep your nitrates super low you won't have a problem in the world with HITH. I know of 2 cases in all of the Oscar owners I know where they actually had to treat with any kind of medicine. And that was medicine they had to get at a Vet's office. My advice is to keep nitrates under 10 ppm while healing and as far under 20 ppm after that for the life of the fish. Shameful few people care enough consistantly to be able to do that. That's my 2¢ so take it or leave it.vdawgs22;3217374; said:yeah he's had hole in the head for some time... he was treated and all of the holes closed up except the ones around his nostril region...what medication do you recommend for the external infection?