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Block Covers 4in and 6in

Block Covers 4in and 6in
Item# BC46
$5.95
Plastic Block Covers: 
Availability: Usually ships in 2-3 business days.

Product Description

• For Rock Wool & Other Grow Media • Blocks light from media— reducing algae & pest problems • Use white side up to reflect light • Use toothpick to hold cover in place