• 888-815-9763 Sales & Support Mon - Fri, 8am - 5pm PST. Instagram Facebook Twitter Google + Youtube


Complete Grow Tent Packages

Complete Grow Tent Packages

Start growing indoors today!

Complete Nutrient Packages

Complete Nutrient Packages

From beginner packages to advanced!

March Nutrients

Fabric Pot Blowout Sale

Gro Pro Fabric Pots on sale now!

Hydrobuilder Learning Center

Expert growing advice and tips!


Hydrofarm 8" Rockwool Block Cover, pack of 40

Item #: HGCOV8

Be the first to review this product

Your Price:

In Stock

In stock items ship within 24 hours

100% Discreet Shipping Price Match Guarantee The HB Difference

Warranties | Returns & Replacements

Hydrofarm 8" Rockwool Block Cover, pack of 40

Additional Images


  • Blocks light from media - keeps moist longer
  • Reflects light up toward plant where it's needed most
  • Eliminates algae and mildeew growth
  • Dual sided white/black covers


Brand Hydrofarm
Weight (lb.) 0.3
Length (in.) 8.5
Width (in.) 8.5
Height (in.) 0.3
Free Shipping No
Grow Media Rockwool

Shipping Info:

Ships Via FedEx/UPS

Questions about this product?
Contact us for advice or more details. Our product specialists are here to help.
Email an Expert
Report an issue on this page

Why Shop with Hydrobuilder?
We offer the best service and support in the industry. Your complete satisfaction is our goal.