RocketEngineer
Space is big.
RocketEngineer, nice build...................... you ever thought of getting a lawnmower blenny along with maybe a yellow tang? I have one of each and they keep my algae in check. I also have a sailfin tang, 2 blue hippo's and a powder brown. Mine was allot worse than yours cause it was literally growing all over my rocks onto my zoas, mushrooms and LPS, so i ended up running ROWAphos along with regular water changes and it went in less than a mth with just small patches here and there. The Tang clan devours all algae in my tank. More snails will also help.
Right now, I'm hesitant to add another fish. However, adding more snails and running GFO are definitely two good options I will implement shortly. "Nothing good happens fast" so I'm going to take my time and get things back under control gradually.