"I bought 2 bags of this sand for my 20 gallon saltwater tank. I rinsed each bag seperately in a 5 gallon bucket and placed it straight into the tank. After filling the tank with water, the tank water was murky for about a day or two, but after letting it settle completely, I hooked up my filtration system, powerhead, and protein skimmer, and the water became clear within another day. The sand is pretty fine, but it weighs down with the water, so it doesn't really get blown around. The appearance of it is amazing, and is definately worth the buy."