Brown SPS ?
If I may suggest ....
Either cut your feedings down, or bump your filtration up
Too much food, IMHO, is the cause of brown SPS
I wish this was my problem
I bleached all my SPS from lack of food
I had major probs last winter with my SPS bleaching from lack of food
I doubled fish foods, added coral foods etc
Algae came on like a banshee, but the SPS are happy now
Just need to balance things ... find the tipping point between fish food and coral food to keep the critters happy and the algae down