Hello - beginner here, very distressed after losing 5 of my 8 fish over the last few weeks. I have a 55 gl tank with all "semi-aggressive" fish: 3 bala sharks, 2 spotted catfish, 2 "regular" catfish and 1 needlenose guy. (Please refrain from mocking those names, I forget the real ones). I've only had the tank a few months, and I've almost always had issues with ICK.. I can't figure out what I'm doing wrong - I do 25% water change each week, the filter is working properly, the temp is right at 80 and all my water quality readings are dead on, every time I test! Can someone educate me? I keep getting attached to these guys and feel terrible I can't save them when they get sick (the Super-Ick cure I've used doesn't seem to work so well).
Thanks in advance for sharing your knowledge with me

Thanks in advance for sharing your knowledge with me
