I'm also battling Dinos. I'm so aggressive with turkey basting the rock and corals several times a day, and changing my filter sock daily they haven't really gained a strong foot hold but they grow so fast. You can practically watch them grow. I'll blast and area clean and 10 minutes later its covered again.
My gfo and carbon reactors arrive in the mail today so I'll be installing them. I've reduced feeding as well and have shortened the photoperiod (blues 8hrs, daylight 5 hrs). I did a 3 day black out to rid some of the last traces of cyano that had been bugging me. Tank has been cyano clear for a month, but Dinos have taken its place.
I'll do another black out this month. I have a question about H2O2 dosing. I've read all the threads on it and get the idea for the most part. Siphon off as much as you can, reduce numbers with lights out, 10 days of peroxide dosing at 1mL per 10 gallons as a final death blow. My question is this...
Doesn't peroxide also kill off nitrifying bacteria? I understand fish, corals, and even some inverts can tolerate it fine. But in theory it should also kill good bacteria. If one doesn't have a bio pellet reactor, how does one go about maintaining good bacterial numbers as to avoid any ammonia spikes? This question is what has kept me from trying peroxide.