It will likely kill off your macro.
It's already clearly been posted in the thread that this will kill basically any and all algae, macro or micro. it stops production of cellular walls in the algae.
i know its alot of pages now guys, but if you re-read the bulk of the first few pages, it will answer every question that has been re-asked here in the last page and a half.
not trying to be rude, but please try not to clutter the thread, lets try to keep it as updates and pertinent new information. links to where to get the drug are posted, aswell as dosing instructions from a few different people.
As for me, I've left my LED lights on most of the time for my dose. My thickest portion of where bryopsis was, is almost entirely gone ( its the last remaining bryopsis ), but there's still a tiny patch that's holding on, its been getting better day by day, so hopefully it just needs time to break down.
Hoping that my leds don't actually have too much UV and ended up breaking down the medication or something. I've only been running them for 2-3 hours a day to see if it helps with the last tiny patch.