R&R SHOP – Fine Lava Rock for Plants, 100% Natural PH Neutral, 1L, Brown
Suitable for hydroponic systems for a 100% Natural Substrate. USE: For an ideal mix, add 10-20% of Lava Rock based on the need for aeration of the land. Total porosity: 70%. Dry matter: 90%. Convenient Envelope with Resealable Pressure Closure.