I had to take the plunge and preform the peroxide treatment as i was losing the battle. I was using Tech M for 1 month, my levels were around 2000. The Tech M slowed the growth but did not kill it off at all for me. I had the bryopsis growing out of rocks, zoas, acans, lps, spofites and the sand. Took me 4 hours, i pulled each rock out that was affected and brushed the area off as best as i could, then treated that area and surrounding area with 100% peroxide and let it sit for 5-10 min then placed it back into the tank. I placed acans, zoas, shrooms, scolly, open brain, and a favia, into a bath of 100% peroxide for about 5 min once i brushed the area affected, then rinsed off and placed back into the tank. I knew this was a risk but made sure to not fully submerge the corals only the bottom where the bryopsis was growing from. This morning everything looks good (as good as it would after being ticked off). I then cleaned the sand and removed many clumps of this crap, my concern is how it was growing in the sand and if it will come back or if it will ever stop (dam fiji pink sand). I did remove a little to much at once as i affected the biological filter in the system, after i feed the fish i had a .25 reading on a api test kit. Last time i had a reading on that kit was during the tank cycle. This morning i tested it again and it was reading 0, so after feedings it rises a bit. I am making sure my feedings are light and nothing goes to waste. Being someone who was having a problem having any reading of po4 in their tank, now i can not get it down, it is always between .02-.04. my target is .010-.015 i am running carbon and BRS HC GFO. My equipment did need a good cleaning which it all got yesterday, my skimmer was gross. I changed out 20% of the water yesterday as well. I plan to do 2 more 10% changes this week. Last night after the cleaning i was still reading .03 po4, hoping this will drop soon. I am not sure what i will do if this crap grows back, i have this feeling it will but i hope i get a couple of months before it does. It was growing about .25 inches a day once i pulled the Tech M out. I do not have pictures as i was to focused on what i was doing, sorry!