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Grodan Gro Block Improved GR6.5 Small 4" w Hole, 4" x 4" x 2.6" Strip Case of 216 cleanroom Less Than 30 Seconds Less Than 30 Seconds narrow profile hook Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops Water distribution is more uniform throughout the entire block which is the basis for a well defined root system with higher capacities for water and nutrient uptake to produce robust and vigorous crops
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