Please help me. I am 90% sure I've been battling columnaris. So far I've lost 3 Angel fish and 2 platys. Currently i am treating with low level salt and furan 2. I did 2 days treatment, water change, and am on day two of sesecond part treatment. Tomorrow I do another 25% wc. I have some kanamycin food on the way. I still see the fuzzy algae on everything. And have cleaned it several times, sterelizing with peroxide. Should I strip the tank? A methalyne blue dip? Should I do another round of furan 2? Everyone looks healthy. No fuzz or ulcers. I'm at a loss of how to help them. Water parameters are dang near perfect. Oh and everyone is acting a little aggressive. Still eating.with the exception of flashing no noticeable issues. Thanks!