Bubble algae can live in almost any environment. It can thrive in almost sterile water. High light, low light, no light. I've been battling it for 6-8 mos. It's some bad stuff. I have aggressive skimming, UV sterilizer, phosban reactor. What I finally did was remove the rock that had the worst of it, clean it all off, scraped it with a knive and a stiff brush and then rinsed off in RO water. Put it back in and so far no bubble algae on any of those rocks. I tried emerald crabs with no luck at all. The best natural method I found was a Foxface. I've watched him eat it. It's now under control but not gone.
Phosphates or nitrates are not the cause. I've read several articles on the stuff, they really don't know what or how. The rock in my tank is between 5 and 10 yrs old and I never had it up until 6-8 mos. ago.
Do not pop them, if you do, as was suggested above, have a siphon ready. If you can remove the rock, clean it and rince it in fresh water. And maybe get yourself a foxface or rabbit fish. I've read where some have seen the naso's eat the stuff too.
Good luck on your quest........
Patt