ok ive been battling red slime in my 75 for a while now and at the end of my rope. i make a 20 percent water change every 2 weeks keep all my parameters in check to my knowlege and i cant get rid of it and chemical treatment doesnt solve the problem just prolongs the ugly slim so what do i do? also i recently noticed i have a dark maroon almost black slime popping up in my 14 gal bio cube.