Looks like I've developed quite shag rug in my substrate. It's not a flow issue that I can say. Ruling out the obvious, flow, overfeeding, one of the only things I can think of is my water supply. My RODI is always clean and I never let the reading go above .025ppm before I change the filters. The one question I have is the development of a slime within the Rubbermaid tub I use which I've never cleaned out until today. I don't generally keep more than 25-30 gallons ready and the top is opened. When I went to grab some water the other day I noticed the bottom of the tub was completely slimy. For those of you that have water stations etc., did you ever notice this within your container and can this be the cause of the hair suit?