6in Rockwool Block Cover
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

Write a review

Please login or register to review

6in Rockwool Block Cover

  • Brand: Hydrofarm
  • Product Code: HGCOV6
  • Availability: In Stock
  • $21.95
  • $18.00
The Controller is very simple—a container with a float valve is connected to the line of units. A ma..
$372.00 $305.04

Extend the effective life of your Active Air carbon filter with a corresponding Active Air pre-filte..
$20.99 $17.21

Clear PVC Premium Plastic Saucers for under you potted plants. Choose the size that will work with y..
$2.82 $2.31

Stainless steel housing is very durable & will not rust. Aluminum cup maintains ideal temperature fo..
$17.95 $14.72

Replacement membrane filter for the HydroLogic Merlin (Garden Pro) Reverse Osmosis filtration system..
$156.95 $128.70

Now with the 4 most popular scales: EC, CF, 500:1 ppm, and 700:1 ppm! The E.C. Dipstick dissolved sa..
$87.95 $72.12

These soft growing containers allow more air to reach the growing medium and roots, improving draina..
$12.95 $10.62

Automatic Submersible pump with a manual override, specifically designed for uses in narrow pits wit..
$212.54 $174.28