I had that issue! lol and I decided if I'm going to keep high phos with high lighting, than I'll raise the nitrates and alk and just siphon out the algae. Then I dosed Microlift special blend and Microbactor clean once a week three day in between!. My tank parameters are now as follow for a year now.
SG: 1.024
Alk: 11
Phos .9(but lowering it to .2 for SPS growth)
Nitrates: 50
Mag 1550,
Cal: 500
PS: once everything's set DON'T TOUCH ANYTHING ELSE, JUST LET IT BE LOL