Top Quality 

100Lt VERMICULITE-COARSE GRADE 

for hydroponics growing medium

Available in 100Lt Bags

Vermiculite is another heat expanded product which has very high water retention - often used as a soil conditioner or for covering seed raising mixes. Vermiculite holds too much water however to be useful as a medium by itself, but can be mixed with other growing mediums to improve the water retention and extend the period between waterings.