For blocks of rockwool and other grow media. Grower's Edge® Block Covers block 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.
Recommended for the Block Covers Grower's Edge 40pk
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$19.99 | $24.99
Product title
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$19.99 | $24.99
Product title
Vendor
$19.99 | $24.99
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