I don't keep a reef anymore, mostly because of loosing the aptasia battle. Took over everything, I ended up nuking the tank.
but anyways, I remember reading that a Green Scat could have saved the day.
Worth a try imho.
I would try to find a small one on your local reefkeeping forum or club then trade it on when your satisfied.
Or buy a 3 incher thats accumated to salt.
I'm just saying this because I tried all the other options here and they didn't work for me, kalk, joe's juice, peppermint shrimp, coperband butterfly fish ect....
but I'm no expert, just thought Id share..