I was fortunate enough to be infested with bubble algae that came along with a coral rock from the LFS. And then I moved a coral to another tank and now that tank has some bubble algae as well. The emerald crabs we had (got rid of them after watching them eat zoas) didn't help with the bubble algae.
My wife and I have been removing it manually during water changes and tank cleaning. Most is gone, but we continue to see it here and there. I think trying to keep it down by removing it when you see it goes a long way. As well as watching nitrate and phosphate levels that feed it.