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Grodan Grotop Master Rockwool Slabs are the best of the best, designed to aid the hydroponic gardener in achieving the best yields and growth all year round. Grodan Master slabs have a dual-layer structure for optimum re-saturation and moisture distribution. They consist of a solid top layer and a porous lower layer to provide equal and balanced distribution of water content and EC which in turn ensures roots are distributed evenly throughout the slab. This ensures the best possible results from your plants, with healthy and extensive root systems they're off to the best possible start for amazing yields and growth!
We stock Grodan Grotop Master Rockwool Slabs in both 1 and 1.2 metre variations, these slabs are single-season products. We do not advise reusing Grodan Master slabs since it is impossible to remove the existing roots from the slab.
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