10'' Round Grow Lids (40-pack) Grow Lids are dual-sided, 5.5mil thick, and are available in both round and square variations. Grow Lids feature a white face to reflect light and a black face to block light and to help with algae, mildew, and pest control. Sold in packs of 40. $5.99 $11.99
8'' Square Grow Lids (40-pack) Grow Lids are dual-sided, 5.5mil thick, and are available in both round and square variations. Grow Lids feature a white face to reflect light and a black face to block light and to help with algae, mildew, and pest control. Sold in packs of 40. $5.99 $11.99
6'' Square Grow Lids (40-pack) Grow Lids are dual-sided, 5.5mil thick, and are available in both round and square variations. Grow Lids feature a white face to reflect light and a black face to block light and to help with algae, mildew, and pest control. Sold in packs of 40. $3.50 $6.99
4'' Square Grow Lids (40-pack) Grow Lids are dual-sided, 5.5mil thick, and are available in both round and square variations. Grow Lids feature a white face to reflect light and a black face to block light and to help with algae, mildew, and pest control. Sold in packs of 40. $2.10 $4.19
3'' Square Grow Lids (40-pack) Grow Lids are dual-sided, 5.5mil thick, and are available in both round and square variations. Grow Lids feature a white face to reflect light and a black face to block light and to help with algae, mildew, and pest control. Sold in packs of 40. $2.00 $3.99