Rockwool Block Cover 4" (40 Pk)

4" Square Grow Lids Dual Sided Black / White Grodan Rockwool Block Covers, 40 Pack Dual-sided 5.5mil grow lids have a white face to reflect light back to the plants and a black side to block light Helps with algae, mildew and pest control...Read more


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Description
  • 4" Square Grow Lids Dual Sided Black / White Grodan Rockwool Block Covers, 40 Pack
  • Dual-sided 5.5mil grow lids have a white face to reflect light back to the plants and a black side to block light
  • Helps with algae, mildew and pest control
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