Hydrofarm HGCOV4 Rockwool Block Cover (40 Pack), 4"
Key features
- •Blocks light from media
- •Reflects light to plant leaves
- •Eliminates algae and mildew growth
Hydrofarm HGCOV4 Rockwool Block Cover (40 Pack), 4"
List Price: $30.94$27.85DEALYou Save: $3.09 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 23, 2026In Stock (30)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.6
out of 5
Based on 9 reviews
5★
89%
4★
0%
3★
11%
2★
0%
1★
0%
Not Hydrofarm
Randy•March 21, 2017
I recieved groxpress not Hydrofarm. Anyone who has purchased these products knows groxpress is a cheap knock off.
Buy Hydrofarm if you want them to last. Awaiting return request. One other thing the one I recieved was torn on one side not cut. Like I said a cheap copy. I will update when I get my refund.
Buy Hydrofarm if you want them to last. Awaiting return request. One other thing the one I recieved was torn on one side not cut. Like I said a cheap copy. I will update when I get my refund.
Does the Job
TJ•December 31, 2016
There's not a lot to say about this. It works exactly as advertised. It fits well and prevents algae growth.
Great to combat algae growth on grow blocks.
patrick ford•May 9, 2016
Great product easier to buy than make myself. Re useable, I just stick in dishwasher to sanitize.
Does the job !!
Paul Nunyabiznus•November 24, 2015
What is there to say...It covers a rockwool block.
Standard rockwool cover. Works very well and comes in ...
Maya Oke•August 5, 2015
Standard rockwool cover. Works very well and comes in different sizes.
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