I have a 125 gallon tank that I just recently set up Using 5 inches of southdown playsand across the entire bottom of the tank. Tank has looked like milk for 7 days now. I did not rinse the sand because I read on here not to( the varied particle sizes are a good thing) or something to that matter. Im getting a little concerned because this southdown stuff says not for aquarium use right on the bag. How long if ever will it take to clear up. Should I leave my powerheads on or off. Some of it has begun to settle but it looks like super fine sediment that will just stirr up again if aggitated. I need an experts advise. Should I put a canister filter on this tank? just to clear it up.