Oh, shoot.... definitely not what I was hoping to hear! The dino-infected tank is my Coral QT/grow out tank...i hate losing the corals I have had in there over the past 6-10 months! They are not looking well now that the dinos have taken over. I've dosed H2O2 the last 3 days and that has helped, but they are still present. Its not an easy environment to maintain any sort of nutrients in since there's no fish in the tank.
I was thinking of breaking down the QT tank, disinfecting everything, then starting back up. Then, immediately start the new "clean" environment with nutrients by dosing nitrates/phosphates to higher initial levels and attempt to keep those levels elevated. Then maybe run extended light schedule to promote some algae growth with those nutrients. Maybe then the algae will have a leg up to out compete the dinos and keep them from returning. Think this sounds like a practical plan?