cr500_af;607879 wrote: if you do have ha, you do have excess nutrients in the system; no two ways about it. Tech m will only work if it is bryopsis (and hope that it isn't).
It takes a multi-level approach... Remove excess nutrients (phosphates) through reduced feeding and more frequent water changes (plus a good skimmer).
Manually remove what you can, and cut back on your photoperiod (this will help but will not beat it all by itself; same for fish that will feed on it).