Rockwool Block Covers, 4", Pack of 40

Savannah Hydroponics & Organics Verified independent store

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PLASTIC BLOCK COVERS Reflect light to plant leaves, where it’s needed most. Block light from media. Eliminate algae and mildew growth. 40 dual sided block covers per pack. Works gr eat with GRODAN Blocks. Block light from media Reflect light to plant leaves where it's needed most Eliminate algae and mildew growth 40 dual-sided block covers per pack Show more