U.S. Pool Supply 3.0 lbs Pool Filter Balls - Eco-Friendly Fiber Filter Media for Swimming Pool Sand Filters (Equals 100 lbs Pool Filter Sand) - Higher & More Efficient Filtration Sand Replacement

I have been using them for a couple weeks. Switched from sand to these. The pool has been clear. I also do not need to backwash as much with them vs when I used the sand. They are also so much easier to work with. They do not cause a potential back injury like sand can lol! If you spill them you just pick them up unlike sand, you weap because sand is so expensive and difficult to deal with. The sand also got in the top of the filter where you change from filter to backwash and made it difficult to move. Not with these! Overall, after a couple weeks of use, I would definitely recommend.