Very interesting. I guess then that all our hypothetical solutions are just that. Do Dino's just stop. Give up. Is there some DNA mechanism that turns off. As opposed blooming they recede. If so what is that trigger. How is it supressed. I've heard. Dirty tanks help. - why. Dinoflagellates consume nitrate as food source. Just like they do in corals. If it were that simple dose potassium nitrate and wait. Predation. As you point out. It decimated your pods. Adding bacteria ie microbacter does nothing. Why would it. It's a thousand times smaller than a protist. I guess we are no further to solution than we were twenty year ago.