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Stonewool is recognized the world over as the ideal hydroponics growing substrate. Grodan stonewool is known for its quality, consistency and performance. These Mini-Blocks are excellent forstarting seeds and cuttings and are easily transferred to larger stonewool slabs once roots have been established. Threestrips of 15 wrapped Mini-Blocks give your customers 45 total blocks each measuring1.5" square.
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