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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.

More Information


Brand: Growers Edge

SKU: GL56714822

Dimension Height: 0.3

Dimension Length: 7

Dimension Width: 6

UPC: 870883008383