Does anyone know where to find cheap pumice/lava rock online?

[Granger2]

15% of aeration rice hulls. What would you use for the other 85%? Have you checked out the EJ AeroRock? EJ says it holds more air than Perlite. Doesn't float or slowly come to surface. Made of some kind of fired clay. I don't know what kind of clay. I think I'll call them next week. -granger

 

[Team Microbe]

15% of aeration rice hulls. What would you use for the other 85%? Have you checked out the EJ AeroRock? EJ says it holds more air than Perlite. Doesn't float or slowly come to surface. Made of some kind of fired clay. I don't know what kind of clay. I think I'll call them next week. -granger

Lava rock

 

[welcomesite]

I've heard from Bonsai growers who use 100% pumice instead of a more expensive Bonsai soil. I learned that there is a product available in some feed stores called "Dry Stall" that is pure pumice. I think it's under $15 for a 40 pound bag? Rinse before using.