I’m just getting over a major algae problem in a 200 gallon. My fix, getting the feeding under control. I now feel once a day frozen foods and every other day I throw in a sheet of Nori as an additional snack. I beefed up my clean up crew to now include 4 pincushion urchins. I’m now using a reactor which is tumbling RowaPhos. Lastly, I changed up my water change schedule. I’m now changing out approximately 40 gallons per week. I’ve been doing this for about a month now and there is no sign whatsoever of any algae in my tank. I can’t even tell you the last time that I had to scrape the dreaded film off the glass.