GROWERS EDGE BLOCK COVER 4" 40/PACK SOLD BY 40 PAC

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    For blocks of rockwool and other grow media. These Grower's Edge® Block Covers blocks light from media—which helps reduce algae. Use white side up to reflect light. Use toothpick to hold cover in place. Hole in center of cover measures 1/2 inch in diameter.

    SKU: 714820