puffcrusader696;2857203; said:theres some good advice here... i've never seen a pic of a tank with pool filter sand but it looks good... i also like the home depot patio sand for a larger grain... i think that looks really good too... i prefer a sand that has varying grain sizes for a more natural look cuz in the wild nothing is gonna weather evenly and produce uniform grain sizes... and with mixed grain sizes it doesnt siphon out well either so it stays in the tank