Where to buy more pumice for Worm Factory
I brought my Worm Factory in for the winter, but first removed almost all the material except for the worm, and started over with new bedding so I wouldn't bring insects into the house. But my new mix has no pumice, and I have been unable to locate any in stores. I could buy a huge amount for like $75 or more online, but don't want to do that. Anyone have any ideas on where to buy a small amount, like a couple of cups' worth? Thanks.