Kieth, by cleaning my sump I mean vacuming out any crud that gets by the first mechanical sponge and then clean that sponge along with the water polishing sponge . I also cleaned my return pump prefilter sponge(3 in total).
I left my bioballs and biorings alone.
Hexed, I have cleaned my bioballs before using tank water and had no problems.
Is there anything else that works besides formulin. I have melafix,pimafix.prozipro,metro,and meth blue. I can get anything else tommorow.
Thanks Josh