Just as Marko9 mentioned, the red bubble u mentioned is it solid red bubble macro algae like green bubble but in red color? or is it red bubble on a "stalk", like a grape? or is it appears to be red bubble under some red slime coating? you have to treat those differently.
pulling the rock out will be your last resort, but before that, you may try lowering the photo period, feed less, heavy skimming, 24/7 fuge with a lot of cheato in it. but if none helps, which like my old tank, then pretty much u just have to tear it apart to start over. my old tank was infested with green grape macro, no matter what I do, I can't get rid of it. but anyways, good luck.