Today I noticed in my 90 gallon ,(that I'm cycling), that a lame iradesent shark that I added in with the 12 mollies is developing ICH. I kicked up the temp to 81 degrees and added 2 tablespoons of salt to treat. I'm gonna gradually add salt for 3 more days. I just saw it in him the past few days and the mollies show no signs. Should I just take the Iradescent out and kill him? Or am I already screwed?