New to reef tanks

[Beverly]

I have had bubble algae in my old 42g hex that I kept trying to scrape off that only got worse with each scraping I tried an emerald crab that forgot about the bubble algae and began eating coralline algae and then my galaxea It got so bad that I eventually tore down the tank, boiled each rock for 3-4 minutes, the cured the rock again and used it as baserock in a larger tank.

I admit, those were drastic measures. Since your emerald crabs are doing a good job so far, though not good enough, I would get a half dozen more to see what they can do for you.

Dang, sounds terrible Good luck