LAVA Mining & Quarrying SA produces and distributes an enriched pumice stone substrate in bags, under the trademark oikiaLAVA, intended for domestic use.
oikiaLAVA is a ready to use grow bag for domestic vegetable production. During the whole period of cultivation it is not required to hole the bottom of the bag for water runoff. The user has only to add water according to the instructions.
The grow bag can be used for at least nine months from the beginning of the first planting and is 100% recyclable.
For more information see the attached manual (in english).
oikiaLAVA manual 
and also watch the attached link
https://www.youtube.com/watch?v=AtV06CCaKgo