Removal of detritus, increased flow, manual removal of Dino strands daily so they do not build up anywhere (turkey baster or your hands), and a UV sterilizer. This worked for me. The blackout and peroxide seemed to stress my corals, and the dinos came back after the blackout. There are a number of different types of dinos, however, so what worked for the ones that I had, might not work for the ones that you have.
The key is patience and persistence. They will eventually go away if you keep at it.
Good luck!