Good morning - So I have this (what I thought initially) was some algae, but when describing to my LFS guy, he immediately went to Cyno - and of course sold me Chemiclean. I used it first time and thought I saw some improvement, but then it came back in about 2 weeks. I just dosed again, but also added a Carbon/GFO reactor about the same time (Phosphates now at 0 when before reactor was in the .25 range. I'm not sure after this last go around (getting ready to do another water change after the 48 hour treatment period) if there was really any effect by this treatment. I'm starting to wonder if its something else. Tried to find something on line but really can't seem to pinpoint. Its exclusively on sand bed. I've taken a picture - hopefully it is clear enough. Some of these thing strings are a couple inches in length. Its not matting but definitely in different locations right where rock and sand meet. My parameters are good - only 3 clowns so minimal nutrient issues, plenty of CUC. I'd appreciate any thoughts/insights you may have. I saw where I can test further to identify by using peroxide to see color change (outside tank of course) and may do that today. In a previous inquiry I received feedback as to spaghetti worm and some type of hair algae. Picture attached. Thanks for any help
