sorry it took so long, computer problem!
The gallery moderator gave this link to the other person that was having problems. It shows pics and it might tell you how to treat it.
www.flippersandsins.net/HITHarticle2.htm
GOOD LUCK!
this is NOT HITH. more like a sore he had that is healing up/to a little infection as that redness indicates..
I dont' know where this is on the Oscar.. So maybe a better pic is needed.
www.oscarfishlover.com best site for oscar info.. but i wouldnt think it is b/c it would be deeper and close to the head/eyes when it first begins but to be safe i would just increase tank maint. :)
Just clean the tank/filter good and do at least a 40% water change.. IF U have not done so in 4 days.. Keeping the tank cleaner is the key and good food with high vitamin content. Vitamin C, B-12, B-6 ect..
i went thru the the same my 25 gallon lasted 1 month then i upgraded to 55