No, not cloudy at all... it has blown around just a little bit from misplaced powerheads, but it doesn't kick up at all... just blows across the bottom. pretty coarse actually. And, it's pre-washed. It didn't cloud my tank in the least, and I didn't wash it. I even stuck my hand down in it, picked up a handful, and dropped it about 4" off the bottom... settled instantly.
"What, exactly, is the internet? Basically it is a global network exchanging digitized data in such a way that any computer, anywhere, that is equipped with a device called a 'modem', can make a noise like a duck choking on a kazoo." - Dave Barry