Pumice....A great inexpensive find for many I hope!
Are you having a hard time looking for a replacement for turface...I just found out that "pumice" which works just as well for me can be found in the form of a product called "Dry Stall" sold by many feed stores to horse people to absorb moisture in stalls. I have a local Agway that sells it. Also grain stores usually carry it too.
I use to buy it for 25 dollars a pop for a 5 pound bag from e-bay, and I just found out that these stores sell bags as large as 40 pounds or 15 dollars. I am picking mine up this weekend.