So I rescued two Oscars from a co-worker who hadn't fed them in about a month and simply gave up on water testing... long story short I bought the tank from this lazy guy and inherited his Oscars... both have Hole in the head one has it REAL BAD... I have treated using API general cure and I have been feeding them well and keeping up on water conditions but the HITH seems to be the same after almost two months.... yet they are behaving much better seems they are more attentive and simply happier but How long should I wait before expecting visual results (holes go away) or should I keep treating them every month or so until better? Thanks any advice will help.