6-month-old 40 gallon AIO. Lots of green algae, cyano and uglies. Had the lights off last week and it was night and day this weekend. Clean and pristine. The green all over my rock was gone back to the beautiful purple and pink. Water was nice and clear. I fed some krill & Brine shrimp per the usual. But twice on Sunday. A little cloudy yesterday a LOT cloudy today. Will adding a protein skimmer change this. Should I be dosing anything else.