Bumping this because I'm having the same problem.
My tank seems to finally be cycled and the water finally cleared (had a bit of new tank syndrome) but now that the water is clear again but I have these white loogey looking blooms and they will NOT go away. I've tried the poor man's uv sterilizer (blankets blacking out the tank) and it isn't killing anything...if anything they've grown. :/ And now my tank is bubbling up! This only began after I blanketed the tank and started the daily water changes to fix the new tank syndrome.
Best part? My fish are all perfectly happy. They're eating, they're active, they don't act the least bit bothered by any of this and yet I'm freaking out. ^_^;;
Thoughts on if the white ickyness and bubbles are related?