Foam glass growing substrate 50l

An innovative porous substrate with a high level of water and air absorption. It is chemically inert, does not affect the PH level, and due to its porous structure it perfectly aerates water. The foam glass substrate can be reused. It does not decompose, does not condense. Water retention capacity after watering is 35%, air capacity (presence of air in pores) 53% (after watering)
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