I have had this bryopsis issue for at least 1.5 years. I have tried the Tech M with no success. I use the NOPOX to simply keep the nitrates at 0. But that still does not kill the byopsis. I run a Maxspect Razor about 18 inches over tank and run the light for 10 hrs with only 5 hours at 45 white and 75 blue. Other 5 hrs are ramping up and down. I cant take the few rocks that are bad out and scrub and boil them because they have corals attached. WOuld the Tan Sea Hare eat this green stuff? I can't think of any other solution. Manual removal does not work unless you completely kill the rock. I have about 40lbs of LR in my tank and about 40 LBs of LR in the sump that is bryopsis free. All paramaters are good. How about a fox face? WOuld it eat the bryopsis like a Sea Hare? I have a MP40 on side of tank. I have a serpent star and 3 turbo stars for my CUC. I feed normal amount of frozen every night. I am dosing 4 ml of NOPOX every morning and still get 0 nitrate and 0 reading of phosphate.