Login
Active Air-Timer
Active Air-Timer
Active Air-Timer
 Next

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.

Need Help?
Questions about Active Air-Timer, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for Active Air-Timer in your area.

Get Shipping Estimates

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
4.5 ★★★★★
Based on 1703 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Alex
Carnegie, US
★★★★★ 5
Great product, would highly recommend
Color: White, Size: Small
Fits great. Very light and breathable material. Very easy to wash and stains come right out
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 24, 2026
R
Verified Purchase
Rafael
Omaha, US
★★★★★ 4
Nice
Color: Navy Blue, Size: X-Large
This is a light and airy, woven shirt. Looks awesome and fits well. Pairs well with jeans and sneakers for a casual look or slacks for a business casual look. I recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 8, 2025
J
Verified Purchase
jeffrey
Los Angeles, US
★★★★★ 5
Great shirt.
Color: Cream, Size: Medium
Fits excellent.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
J
Verified Purchase
Jacob Cosmeus
Charlottesville, US
★★★★★ 5
Good quality 😍
Color: Ice Green, Size: Large
I really like this shirt! The knit material feels soft, breathable, and perfect for warm weather. The design looks stylish and modern, exactly like the pictures. It fits true to size and sits really nice on the body—comfortable but still fitted enough to look clean. Great for summer outings, brunch, or beach vibes. Definitely worth the purchase
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 19, 2025
T
Verified Purchase
Timothy johnson
Chelsea, US
★★★★★ 5
Awesome shirt
Color: Light Pink, Size: 3X-Large
I love this shirt awesome I brought three of them the other 2 are arriving today Thankyou coofandy
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026

recommand products

Zomodo RFC140U - 32'' Super Single Sink - Undermount, 18Ga, R50, Nested Pallet (Moq 40Pcs)
Zomodo RFC140U - 32'' Super Single Sink - Undermount, 18Ga, R50, Nested Pallet (Moq 40Pcs)
278.00
 Treemme TRRTBR341 - 12'' Round Ceiling Drop
Treemme TRRTBR341 - 12'' Round Ceiling Drop
231.00
 Zomodo WKS-50C-RB - Drain Kit Spigot, Sus304, 50Mm, For Cupc Wk, Rb
Zomodo WKS-50C-RB - Drain Kit Spigot, Sus304, 50Mm, For Cupc Wk, Rb
12.00
 Simas SI1AG61CCNA - Wall Hung Console With 1 Hole Wash Basin - 24'' X 18'' Navy Matt
Simas SI1AG61CCNA - Wall Hung Console With 1 Hole Wash Basin - 24'' X 18'' Navy Matt
1123.12
 Simas SI1AG51TE - 1 Hole Countertop Or Wall Hung Wash Basin - 20'' X 18'' Tela Matt
Simas SI1AG51TE - 1 Hole Countertop Or Wall Hung Wash Basin - 20'' X 18'' Tela Matt
523.12