CO2GRO

CO2GRO C2 EXT CO2 Controller

£199.95
Tax included. Shipping calculated at checkout.
Speak with us on WhatsApp

Pickup available at Bansley Store

Usually ready in 24 hours

Payment Methods
American Express
Apple Pay
Bancontact
Diners Club
Discover
Google Pay
iDEAL Wero
Maestro
Mastercard
PayPal
Shop Pay
Union Pay
Visa
Shipping & Returns

Our current shipping rates are as follows:

  • UK Orders Over £50 – Free Next Day Delivery
  • UK Orders Under £50 – £8 (Next Day Delivery)
  • UK Orders Next Day AM – £20
  • UK Orders Saturday AM – £30
  • International Orders DAP – Select between UPS or Fedex and we'll sort the rest. (All duty paid by us prior to shipping)

All parcels are fully tracked. Once your order has been dispatched, you’ll receive an email containing your tracking number.

If your order is classed as an oversized item OR deemed extra heavy, additional heavy shipping duty will be added at checkout when selecting your shipping options.

Returns

We want you to be completely satisfied with your purchase, but if you change your mind, you may cancel your order within 14 days of receipt for a full refund, provided the items are unused and in resalable condition.

Once your cancellation has been confirmed, you must return the items within 14 days, ideally in their original packaging.

Click & Collect

Order online and collect directly from our Sheffield OR Barnsley store. Once your order is ready, you’ll receive an email or phone confirmation with collection details. Please wait for confirmation before travelling to ensure your order is prepared.

Please have your order number ready to give to a member of staff when you arrive.

Sheffield Store:
GSH Retail Ltd
Unit 5, 230 Woodbourn Road
Sheffield
S9 3LQ

Barnsley Store:

GSH Retail Ltd
Unit 6, Rockingham Business Park
Rockingham Row, Birdwell
Barnsley, S70 5TW

Local Same Day Delivery Service

Our man in a van!

Same-Day Delivery Service

Enjoy fast, reliable, and fully discreet same-day delivery with Green Spirit when you order from our Sheffield store area.Whether you shop online or
in-store, we make getting your items easy,convenient, and secure.

Order Online

When placing your order through our website, simply select the Same-Day Local Delivery option at checkout.

  • Free Same-Day Delivery on orders over £250.00
  • Available customers within a 3-mile radius of our Sheffield store (S9 3LQ)
  • Orders under £250.00 can still be delivered the same day for a £50.00
    flat fee

Your order will be prepared and delivered directly to your
door the very same day, using our discreet delivery service.

Order In-Store

If you prefer to shop in person, visit our Sheffield
location to browse, purchase, and arrange delivery.

  • Pay
    in full for your items in-store
  • Choose
    a delivery time and date that suits you best
  • Our
    team will ensure a smooth and convenient handover

Discreet Delivery Promise

We understand the importance of privacy.

  • All
    our delivery vans are plain and unmarked, with no company
    branding
  • Parcels
    are packaged in plain or black wrapping for complete discretion

Delivery Requirements

To ensure everything runs smoothly:

  • Customers
    must be present at the agreed delivery time
  • Drivers
    cannot wait for extended periods
  • If
    the customer is not available, items will be returned to the store and a £50.00
    redelivery fee
    will apply

Upon
delivery, we will request a order number, name and signature to
confirm receipt

Discreet Shipping

All orders from GSH Retail Ltd are packed securely and shipped in Plain unbranded boxes for your privacy. We understand that discretion is important, so no external markings or product details are visible on the packaging.

Each parcel is also wrapped in durable black film and sealed with fragile tape to ensure both security and protection in transit.

We take great care to make sure your order arrives safely, discreetly, and in perfect condition — every time.

Methods Of Payment

We accept a wide range of secure payment options for your convenience when shopping with GSH Retail LTD

You can pay using:

Visa, Mastercard, American Express, and Discover

Apple Pay, Google Pay, and Shop Pay

PayPal – Fast and secure online checkout with buyer protection

Klarna – Flexible payment options, including Pay in 3 instalments or Pay Later

Clearpay – Split your purchase into four interest-free payments

Weston Union– Supported for international customers

Cash In The Post - This is at your own risk! Please make sure it is signed for, tracked, and insured.

Manual Bank Transfer - Contact a member of staff to organise paying via bank transfer.

All transactions are processed securely through Shopify’s encrypted checkout. Your payment details are never shared directly with us.

Once your order is placed, you’ll receive an order confirmation email, followed by tracking details once your parcel has been dispatched.

Finance Options

We offer flexible finance options to make purchasing easier. You can choose to spread the cost of your order, all three options are interest-free and give you the flexibility to manage your payments in a way that suits you.

PayPal Pay in 3

PayPal Pay in 3 allows you to divide your purchase into three equal interest-free payments over two months. The first payment is made at checkout, followed by two automatic payments each month.
It is available on orders between £30 and £2,000, and approval is completed instantly through your PayPal account. You can view, manage, or make payments easily through the PayPal app or your online account.

Shop Pay

Shop Pay Installments lets customers pay for an order in smaller increments over time.When available, Shop Pay Installments is a great option to help you maximize your budget for orders between the following amounts, depending on your location:


Klarna


Klarna offers two flexible ways to pay. With Pay in 3 instalments, your order total is divided into three equal payments, taken every 30 days with no interest or fees when paid on time. Alternatively, you can choose Pay Later in 30 Days, allowing you to receive your order first and settle the balance within 30 days. Klarna provides instant approval at checkout, and all payments can be managed securely through the Klarna app.

Clearpay

Clearpay lets you spread the cost of your purchase into four equal interest-free payments, taken automatically every two weeks. The first instalment is paid at the time of purchase, and the remaining three are collected automatically over six weeks. Clearpay is available for orders between £30 and £1,000 and can be managed easily through the Clearpay app.

Important Information

All finance options are subject to eligibility and approval by the provider. Late or missed payments may affect your credit score, so please ensure funds are available when payments are due. For details about eligibility, limits, or payment schedules, please refer to the provider’s website or app.

Earning Points & Rewards

At GSH Retail we believe loyalty should be rewarded - Our Points & Rewards scheme allows you to collect points every time you shop and redeem them for discount codes to use on future purchases.

When you make a purchase through our website, you’ll automatically earn points based on the value of your order. These points are added to your account and can be saved or redeemed whenever you choose. Once you’ve collected enough points, you can exchange them for a unique coupon code that can be applied at checkout to reduce the cost of your next order.

Earn 5 Points for every £1 spent
Redeem 100 Points for £1 Store Credit

Your points never expire as long as your account remains active, and you can track your balance easily through your customer account dashboard. It’s our way of saying thank you for choosing GSH Retail Ltd

To redeem your points, simply log into your account, view your available balance, and follow the on-screen instructions to generate a discount code. Enter the code at checkout to instantly apply your reward.

Introducing the Brand-New CO2GRO C2 EXT CO2 Controller!

Maximize plant growth and optimize yields with the latest CO2GRO C2 EXT CO2 Controller! Designed for precision and efficiency, this innovative CO2 controller allows growers to accurately dose and regulate carbon dioxide (CO2) levels in their grow spaces, ensuring plants receive the optimal conditions needed for enhanced photosynthesis and accelerated growth.

Why CO2 Enrichment Matters

Carbon dioxide plays a crucial role in plant growth by fueling the process of photosynthesis, where plants convert light energy into essential sugars and oxygen. With increased CO2 concentrations, plants can photosynthesize more efficiently, leading to faster development, improved flower quality, and greater overall yields.

Outdoor air typically contains about 400 ppm of CO2, but studies have shown that many fruiting and flowering plants thrive at levels between 1,000 and 1,200 ppm. The CO2GRO C2 EXT Controller enables growers to maintain these optimal conditions effortlessly, providing the ideal growing environment for healthier and more productive plants.

Key Features of the CO2GRO C2 EXT Controller

  • Precise CO2 Control: Fine-tune CO2 levels to maximize plant growth and yields.
  • External CO2 Sensor Probe: Accurately monitor CO2 levels while keeping the main unit outside the grow space.
  • Day & Night Auto Detection: Automatically adjusts CO2 levels based on light cycles.
  • Timelapse CO2 Chart: View historical CO2 concentration trends for better optimization.
  • Easy-to-Read LCD Screen: Monitor CO2 levels and settings with a user-friendly backlit display.
  • No Assembly Required: Ready to use straight out of the box.

What’s Included?

Each C2 EXT Controller comes with:

  • C2 Controller Unit
  • External CO2 Sensor Probe
  • Velcro Tape Strip
  • User Manual
  • Mounting Screws

The Benefits of Using CO2 Enrichment

  1. Enhanced Photosynthesis – Higher CO2 levels stimulate photosynthesis, allowing plants to absorb more light energy and convert it into essential nutrients.
  2. Increased Yields – Optimized CO2 conditions result in faster growth and more abundant harvests.
  3. Superior Flower Quality – Plants grown with CO2 supplementation often produce denser, more vibrant flowers.
  4. Shorter Growth Cycles – Plants mature faster, leading to more frequent harvests and improved efficiency.

Best Practices for CO2 Enrichment

  • Monitor & Maintain CO2 Levels: Keep CO2 concentrations within the ideal range (1,000–1,200 ppm) for optimal growth.
  • Ensure Proper Ventilation: Good airflow prevents CO2 stagnation and ensures even distribution throughout the growing area.
  • Regulate Temperature & Humidity: Keep temperatures between 28-32°C to maintain proper transpiration rates and plant metabolism.
  • Adjust Nutrient Levels: Plants grown with CO2 enrichment may require higher electrical conductivity (EC) levels to support increased metabolic activity.
  • Use CO2 Only During Light Cycles: CO2 supplementation should be active only when lights are on (typically 12-18 hours per day).
  • Prioritize Safety: Always use certified CO2 equipment, maintain proper ventilation, and consider a CO2 alarm for added safety.

Conclusion

The CO2GRO C2 EXT CO2 Controller is the ultimate tool for growers looking to maximize plant health, boost yields, and optimize cultivation conditions. Whether you're managing a small indoor grow room or a large-scale greenhouse, this advanced CO2 controller provides the precision, reliability, and ease of use necessary for successful plant growth.

Unlock the full potential of your plants with CO2 enrichment—order your CO2GRO C2 EXT Controller today!