White contributes more to algae growth. It does help par though and make the tank nicer to view. Blues and UV are absorbed by corals and minimizes their affect on algae. When I said 100 I meant spectrum color for blue and UV. Intensity is your preference based on par for your coral. Briopsis has a very fern like appearance on its branches. Can't tell from your pics due to blurry. You want nitrates at 10 and phosphate around. 07 to .1 for your coral nutrients. If you can close up the algae under white light only please for ID.Well the ICP says 2ppm. Hard to tell the difference between 0 and 2 with standard kits.
It does not look like bryopsis. Does it look like yours from the pictures?
my light (viparspectra) cannot be kept that high in such a small tank. I use the settings suggested by other users (1%W, 15% blue). I will increase blue channel to 30 until I can turn whites back on, it should not hurt anyway.
Why is there a problem with the white channel btw in your opinion?