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Browse for Rockwool Block Cover best prices at RankeDeal.com

  • Grower's Edge Block Covers - 4" (40/Pack)

    For blocks of Rockwool and other grow media. These grower's edge block covers blocks light from media- reducing algae and pest problems. Use white side up to reflect light. Use toothpick to hold cover in place. Hole in center of cover measures 1/2 inch in diameter.

    • ASIN: B00CJIBMR6
    • Color: N/A
    • Brand: Grower's Edge
    • ASIN: B00CJIBMR6
    • UPC: 870883008376
    • Part No: 714820

  • Hydrofarm HGCOV4 Rockwool Block Cover (40 Pack), 4"

    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 great 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.

    • ASIN: B00C7Q407E
    • Brand: Hydrofarm
    • ASIN: B00C7Q407E
    • UPC: 638104945783
    • Part No: HGCOV4

  • Hydrofarm HGCOV6 Rockwool Block Cover (40 Pack), 6"

    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 great 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.

    • ASIN: B000ICXKRA
    • Brand: Hydrofarm
    • ASIN: B000ICXKRA
    • UPC: 638104945790
    • Part No: HGCOV6

  • Hydrofarm HGCOV8 Rockwool Block Cover (40 Pack), 8"

    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 great 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.

    • ASIN: B00KCPJTIW
    • Brand: Hydrofarm
    • ASIN: B00KCPJTIW
    • UPC: 638104005883
    • Part No: HGCOV8

  • FloraFlex FloraCap Plastic Block Cover - 4-Inch - Pack of 3

    Place the revolutionary FloraCapsTM on your 4" Rockwool cubes and maximize your space in the vegetative cycle. 17 flower-designed louvers block light while allowing air, water, and nutrients to your plants. The FloraCapTM was designed with the vegetative state in mind but has proven a worthy tool for the avid top feeder throughout the flowering stage as well. Eliminates algae and the use of pesticides by covering the media.

    • ASIN: B06XD45B3B
    • Color: Green
    • Brand: FFloraFlex
    • ASIN: B06XD45B3B
    • UPC: 851054006629
    • Part No: 127

  • Coco Cultivate 6" Block Cover Cap with Hole (40)

    Coconut fiber promotes plant health and is extremely eco-friendly. These 100% natural coconut coir fiber covers work great for preventing algae from growing on top of your Rockwool blocks. Coconut coir has an outstanding water-holding capacity (it can absorb 8 times its own weight in water) and the fibers act like mini-sponges, retaining water for long periods of time while releasing nutrients in ideal increments. The result of those benefits is more vigorous plant growth. Coconut coir is attractive because it's a byproduct of the coconut industry that is not eaten or used as fuel, and on top of that, it actually promotes plant health. Coconut coir has an outstanding water-holding capacity (it can absorb 8 times its own weight in water) and the fibers act like mini-sponges, retaining water for long periods of time while releasing nutrients in ideal increments. The result of those benefits is more vigorous plant growth.

    • ASIN: B06X3XHPH6
    • Brand: Coco Cultivate
    • ASIN: B06X3XHPH6
    • UPC: 748006942541

  • Grodan Rockwool 1.5" x 1.5" x 1.5" Mini Blocks Pack of 45

    Starter MINI-BLOCKS can sit in a tray (flat) without support for easy starting of seeds and cuttings. They are individually wrapped to minimize algae growth. For best results put them on the flat side of the GRO-SMART Tray to ensure good airflow around the cubes. Remove wrapping and transplant into any loose media such as GROW-CUBES or GROW-CHUNKS, or leave wrapping on and set on top of a larger GRO-BLOCK. These cubes are popular for production of aquatic plants. The advantage MINI-BLOCKS have over A-Ok Starter Plugs and MACROPLUGS is that MINI-BLOCKS can sit in a tray without support.

    • ASIN: B00XQECROY
    • Brand: Grodan
    • ASIN: B00XQECROY
    • UPC: 636676822327
    • Part No: SG_B00XQECROY_US

  • FloraFlex - FloraCap (6" [3 Pack])

    Place the revolutionary FloraCapsTM on your 6" Rockwool cubes and maximize your space in the vegetative cycle. 17 flower-designed louvers block light while allowing air, water, and nutrients to your plants. The FloraCapTM was designed with the vegetative state in mind but has proven a worthy tool for the avid top feeder throughout the flowering stage as well. Eliminates algae and the use of pesticides by covering the media.

    • ASIN: B01IEA6DW6
    • Color: Green
    • Brand: FFloraFlex
    • ASIN: B01IEA6DW6
    • UPC: 851054006100
    • Part No: 17

  • R&M Rockwool Block Covers, 6-1/2-Inch, 40-Pack

    2 Faced block covers reflect light back towards plants in addition to protecting them from algae growth. The white face reflects light to the plant while the black face blocks light from the media and helps with algae, mildew and pest problems. Our unique circular design prevents light passage to your blocks even when the cover shifts or moved.

    • ASIN: B009RK6UBW
    • Brand: R&M
    • ASIN: B009RK6UBW
    • UPC: 051000101761

  • FLORACAP 10 Pack of 4 X 4" FloraFlex Cover Your Rockwool Cubes Blocks

    Place the revolutionary FloraCapson your 4", Rockwool cubes and maximize your space in the vegetative cycle. 17 flower-designed louvers block light while allowing air, water, and nutrients to your plants. The FloraCapwas designed with the vegetative state in mind but has proven a worthy tool for the avid top feeder throughout the flowering stage as well.Eliminates algae and the use of pesticides by covering the media. -17 flower-designed louvers. -Built-in overflow system where excess water and nutrients are delivered straight to the rootball. -360° bottom lip directs all water and nutrients to your plant. -Four three-way stakes on the bottom for extra stability. -Holes in all four corners for leftover water drainage. -Stackable. -Reusable. -BPA and lead-free plastic.

    • ASIN: B07CCGKMFQ
    • Brand: FLORACAP
    • ASIN: B07CCGKMFQ
    • UPC: 686912194794

  • 6 in. Rockwool Block Cover - Pack of 40

    • ASIN:
    • Model: HGCOV6
    • Color: N/AOther