Black Swallow Pumice Stone 3/8" X #8-21 Size:11L (3 Gal) Bag 50% thicker construction

50% thicker construction

***Please note – ProFilter is only suitable for systems which run 1/2” flexible hose

Ideal for drying large quantities of plant material like herbs

and rock wool

Black Swallow Pumice Stone 3/8" X #8-21 Size:11L (3 Gal) Bag 50% thicker constructionPlease Note This product is oversized, and does not qualify for free shipping. Adding it to your order will remove your free shipping option. Order oversized items on a separate order to avoid extra shipping charges. Pumice is a relatively light weight volcanic, porous, stone material that is popular on the west coast to provide aeration to soil mixes. Because it is a stone material, it does not break down in the soil. Its porous nature allows it to