Well i have spent the past 2 hr reading up even more on Dino's and seem to be deadlocked. I have seen more pictures than i can count and read more descriptions of this nasty stuff than i wanted to. I am 100% positive i have dinoflagellates. I am out of town on a business trip so pictures to come soon. I have done almost everything i can to try and take this stuff out. Reduced lights, Blackouts, daily water changes, tried to H2O2 dose but think their is too much tbh. I have not tried DINO-X. What are your guys suggestions. I have a VERY little bioload and feed once every other day, very little. Any suggestions? Should i say the hell with it and just tackle it in the fall when all my attention goes back twords the fish hobby? The tank is not new at all. its a good 10 or so years. I'm not sure how they come upon either. They come on after i hooked up my BioPellets that were rinsed and soaked before added. Anything is appreciated.