hi i am kinda new to the hobby had my tank just over 2 months now, did all the cycling tested my water yesterday everything was how its supposed to be zero WOOT and i do the 25% once a week water change.i have a 20 uk gal. however a couple of my fish have long trails of waste hanging from them and they have rapid gill movement. whats the problem? how do i treat it? and will any meds affect my filter bacteria?
thanx!
thanx!