Nuisance algae(?)

[Phirefase]

I am having trouble with a couple of my tanks getting these strange brown fuzzballs, red hair algae looking stuff, and white growths on the substrate and plants, and cannot figure out what they are. The stuff seems to coat the entire substrate fast even after I vacuum it up. Any help identifying what they are is greatly appreciated. Thanks.

[Mmiller2001]

The bottom picture looks more like detritus buildup. If you increase filter turnover rate inside the tank, that should take care of it.