Little white things

#1
They're in my 29G and i have absolutely n clue where they came from. They're rod shaped, white, and seem to be attached to some of the decor. I think it's some kind of fungus. There's also these web/thread like things on my plants(plastic). Maybe they're connected in some way--or the same thing. Anybody know anything 'bout this gunk?(and how to get rid of it?)
 

Jun 22, 2003
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NS, Canada
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#2
Do the *rod-shaped* thingies have little arms on the end, and they wave in the current and move around? If so, they are freshwater hydra. They aren't harmful to larger fish, but can eat little fry. With good water conditions they will go away.

There are thread algaes that look like threads (obviously!)