I also had a bryopsis outbreak. I used kent tech m I raised mmy mag level to 1800 as well. I monitored it and maintained at that level for 2 months. The bryopsis was gone 100% in the first month but I wanted to make sure it was gone and not coming back. I had my skimmer run the entire time. I let the levels return to normal on they're own after the 2 months by my normal weekly 5 g. Water change my system is about 75-80 gallons total.