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Grodan Rockwool Delta 6.5 Block, 4" x 4" x 2.5" 6/strip shorty

Grodan Rockwool Cubes 4 x 4 x 2.5 are cubes of stonewool (rockwool) that have a grooved base. Promoting drainage to avoid root rot. Grodan Rockwool is pH neutral. Making it easy for you to maintain the ideal hydroponics pH value of 5.5 – 6.5. Each gro-b
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