Can't get rid of fin & tail rot
I've been keeping discus for 9 months now. 100 gal, P.H.=6.9 Temp=87 deg. F. Using soft water from my tap. I do 30% water changes 3 times per week, use a UV sterilizer and activated carbon. Still my discus only last a few months, then die. Their tail fins (which are normally clear) will develop small "cloudly" or white spots on edge of their tail fins. Then the fin ends will rot away. To me, it doesn't look like a fungus or cotton growth. The fin itself just turns a cloudy white color in small areas. Over the last several months, I've treated with Quick Cure, Maracyn, Maracyn II, Melafix, Pimafix. The Maracyn medications seem to work,but it comes right back after medication stops. What am I overlooking????
Thanks, Kevin. keinert@sbceo.org