my fish keep getting sick 3 weeks ago my fish got ick now they just got fin rot I was wondering why my water conditions were fine last time I don't know why they are keep getting sick I have a protein skimmer that's for 100 gallons and a 525 canister filter and I only have 2 fish and they keep getting sick no matter what I do this is the second time for both fish I have been feeding them garlic and multivitamins to build up their immune system but they keep getting sick

