well, I'm following the advice of Julian Sprung, Randy holmes-farley, & Eric Borneman all of whom say limit the trace elements/nutrients in the water. Sprung specifically says to "suspend" wc's. Here are 2 online articles I've referenced, and Sprungs book on algae. The only component not in place is the use of carbon. I've already went thru the 40% weekly wc for over 3 months with no change in the tank so now it's time (for me at least) to try it their way.
Dinoflagellates - Predators, Pathogens, and Partners by Eric Borneman - Reefkeeping.com Problem Dinoflagellates and pH by Randy Holmes-Farley - Reefkeeping.com Algae: A Problem Solver Guide