Hey Jack,
Digging up your old thread, did you ever find a solution to bryopsis?? I got lucky to acquire two tangs that eats it like mad. A few who have seen my tank could tell you how badly my tank looks covered from top to bottom by this stuff. After putting these two tangs Kole and Sailfin. My algae problem have gone wayyyyyyyyy down. Almost algae free! After battling with it for the past three years I was about to give up and dump pool bleach in there, but now I don't have to anymore. I have to find a picture for you on how badly it was covered. I can't find my camera charger anywhere.....I'll take a new picture one of these days on how it looks now. Here's my observation on tangs that eats bryopsis, both time I got the tangs when they're young, when I got the regal he was pretty small, these 2 new tangs are also small. I leave'em with bunch of algae and they went crazy eating it. I might be wrong, but that's my observation is when you get them young, you might be able to get them to eat it better. Either that or I just got lucky on both cases.....Let me know how things are going!