I use Estes' medium broadcast quarts granules. You can vac it without getting much in the bucket I just dump it back in when I'm done cleaning. They have 18 colors and a few premixes. It is also very clean and dustless. They also have an aquarium grade sand but is more expensive. You will have to find a flooring dealer in your area, here is their web site GL http://permacolorquartz.com/services.html