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Active Air-Timer
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Active Air-Timer

Marsoni M251S
Sale price$123.59
Pay 4 payments of $30.90 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
Active Air-TimerDeliver growth boosting CO2 with our user friendly, easy to operate system. With its programmable timer, it will automatically maintain ideal CO2 levels for optimum growth. For small to medium size areas, select the COSYS; for larger than 10' x 10' areas, select the COSYS20. To use Hydrofarm's CO2 Flow Rate Calculator, click HERE NOTE: Current COSYS & COSYS20 now come equipped with a black rubber O ring that has replaced the white plastic washer.
Easy Shipping

Quick Dispatch:

Your Active Air-Timer orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your Active Air-Timer ships.

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 1001 reviews
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Product Reviews
T
Verified Purchase
Tracey S.
Chelsea, US
★★★★★ 5
Really nice quality blanket
Brought for my grand child so soft and adorable reasonably priced.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2025
A
Verified Purchase
Avalon
Bozeman, US
★★★★★ 5
Cute
Perfect size for a toddler & very cozy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 4, 2026
B
Verified Purchase
Big Sexy
Houston, US
★★★★★ 5
Elmo blanket
This super soft cuddly Elmo blanket was perfect for my 2 yr old God Daughter. It will get many miles put on it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 22, 2025
A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 5
Love
Super cute and better material than expected
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2026
C
Verified Purchase
cab
Los Angeles, US
★★★★★ 5
Very soft blanket
This is the perfect summer blanket. It’s soft and cuddly but not bulky. My Grandson likes it so much I had to buy a second one for my home when he naps.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2024

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