ewok, I did'nt go with pool filter sand. I have carib-sea gold. it looks dark in the catalog but it's really light tan. it's on the expensive side at 20.00 for a 20 lb. bag but it comes wet, so no rinsing. I tend to suck up sand with my python. I put a small bucket under the faucet. when I start filling I dump the sand back in. no clouding at all. the only bad thing is you can see every bit of crap and it bothers me a bit as I'm a clean freak when it comes to my tank.