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Grodan IMPROVED Gro-Blocks 4″X4″X2.5″ (GR6,5)

Grodan IMPROVED Gro-Blocks 4″X4″X2.5″ (GR6,5)

by Pierre Spenard | Sep 19, 2026 | Uncategorized

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from one batch of wool, Grodan is unique by making different types of...
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