I have a bubble algae problem. ( I believe it's Valonia aegagropila) Other than an mithrax crab - I've heard they are hit and miss and some have issues with coral and fish - what else is there? :-/ I read here once of someone using a dental tool and a siphon with good results, but that seems a bit tedious. (although I think I will try it.) I used to have just one or two bubbles around, but lately with halides and more fish (more food) they are spreading big time. Not as bad as aptasia, but very annoying. Anything work for you or have you heard of other solutions not mentioned? I'd love to hear them.