Hydrofarm HGCOV4 Rockwool Block Cover (40 Pack), 4″

Blocks light from media
Reflects light to plant leaves
Eliminates algae and mildew growth

PLASTIC BLOCK COVERS Mirror gentle to plant leaves, the place it is wanted so much. Block gentle from media. Get rid of algae and mould expansion. 40 twin sided block covers in step with percent. Works nice with GRODAN Blocks.- Block gentle from media – Mirror gentle to plant leaves – the place it is wanted so much – Get rid of algae and mould expansion – 40 twin-sided block covers in step with percent.
Blocks gentle from media
Displays gentle to plant leaves
Removes algae and mould expansion

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