So i have 2 FH with a convict now for about 2 months. About 3 Weeks ago it had ick and it was cure. Now i just recently transfer him to a bigger tank and it now got ick, started about 2 days ago. The only problem with my water is the PH, the ph before was 7.2 now it's 7.6, everything else is good. The tank been set up for about 3 weeks now. The question is how come my two FH is getting ick and my convict is not. My convict is about 1.5inch, smallest fish in the tank. It never gotten ick but every other fish had.