Bubble algae should I buy and emerald crab?

[untamed]

I've always had bubble algae in my tank...never found any critter that eats it...but also I've never found them to become a problem. My guess is that they never multiply out of control because I grow so many types of macroalgae that they likely compete for nutrients. If the bubble is the ONLY algae you have, you might find it to be a problem.