Red Sea CO2 Electronic Control Valve (Solenoid)

RS2321

This item has been discontinued.

Red Sea Solenoid for automating dosing of CO2

Too much CO2 can reduce the pH in an aquarium to levels that are stressful for fish. For the safe use of CO2 it is highly recommended to automate the CO2 system with either a simple time switch or by a pH controller. The in-line solenoid Control Valve connects the CO2 system with either of these devices. Includes both a hose barb with lock nut for in-line connection on the CO2 tubing and a standard 1/8” thread for direct connection to a pressure reducer.
  • Low working temperature
  • Low (2W) power consumption
  • Connects to time switches or pH controllers
  • Suitable for all CO2 systems
  • Easy installation

Manufacturer Info

With a dedicated team of scientists and other professionals, Red Sea is widely recognized as a leading innovator and manufacturer of quality products for aquarium hobbyists. Red Sea constantly strives to provide hobbyists of all levels with highly effective solution-driven products designed to make your fish-keeping experience as enjoyable and successful as possible.

The embodiment of Red Sea’s dedication to providing solutions for today’s reef-keepers is its range of MAX-NANO, MAX-E & MAX-S aquariums- The only choice for true Plug & Play™ coral reef aquariums, now featuring the very latest in LED lighting technology.

For advanced reef-keepers the Red Sea REEFER provides a great platform into which you can add your own selection of hardware. With its ultra-clear glass, ATO built-in, silent flow valve and superb quality of finish the REEFER sets the standard for those wishing to customize. REEFER is also available as a Deluxe version with LED lighting included.

Red Sea’s unique Reef Care Program (RCP) provides a comprehensive, safe and easy to use program for testing and supplementing within reef aquaria, and is perfectly complemented by Red Sea’s Coral Pro & Red Sea Salt’s, which has become the salt of choice for those seeking the very highest quality water quality for their coral reef aquariums. Both salts are made using a unique natural process which delivers unrivalled homogeneity and is perfect for delicate corals. Check your individual bucket of salt’s composition using Red Sea’s innovative new “MyBatch” software.

Whatever your aquatic needs, Red Sea delivers high quality innovative, solution based products.

Ask a Question Earn 25 Points when you ask or answer a question
Sort By :
 
9 Questions
Displaying questions 1-9
 
 
Write Your Review Earn 25 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.7

3 Reviewers (100%) would recommend this

Overall Rating:

download image
5  Star
 2
4  Star
 1
3  Star
 0
2  Star
 0
1  Star
 0
 
5
5.0
Quick, easy and reliable

reviewerbadge
REVIEW
Bought this to replace the solenoid that came with the Gauge for my CO2 tank. The first solenoid never worked right and CO2 would slowly leak. The Red Sea was really easy to install and is keeping the reactor at the ph I set. I am completely satisfied with this product.
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
5
5.0
Red Sea CO2 ECV

reviewerbadge
REVIEW
The product was precisely what I needed for my calcium reactor. It may be intended for aquatic plants but it works equally well for a calcium reactor. The product arrived on time and in brand new, in the box condition.
  • 1
Was this review helpful: Yes(0)No(0)
 
 
 
4
4.0
Red Sea C02 Valve

reviewerbadge
REVIEW
Gets a little hot but was easy to install and works well.
  • 1
Was this review helpful: Yes(1)No(0)
 
 
 
Write Your Review Earn 25 Points when you write a review
Sort by:
 

Overall, others give this:

  • 4.7

3 Reviewers (100%) would recommend this

Overall Rating:

download image
5  Star
 2
4  Star
 1
3  Star
 0
2  Star
 0
1  Star
 0
 

Free, Fast, and Flexible Shipping Options

  • Most products ship free—no minimum purchase required

    We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in 5-7 business days.

  • upgrade your shipping for only $4.99—free upgrade for orders $199+

    Over 90% of our members receive their orders within 2 business using UPS Ground. Upgrade from free economy shipping to UPS Ground for only $4.99—or spend $199 and we’ll upgrade you automatically!

  • need your order even faster? no problem!

    Expediated shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.

  • buy it today and we'll ship it today

    Same-day shipping is available Monday-Friday for most products—place your order by 10 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.

Learn More About Shipping

60-Day Return Period with Easy Online Returns

Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.

A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.

Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.

Learn More About Returns

Earn 5% Cash Back for Most Purchases

Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!

  • Most Products
    Earn 5 reward points for every $1 you spend to get 5% cash back
  • Marine Depot, AquaMaxx, Accel Aquatics, and Korallin
    Earn 6 reward points for every $1 you spend to get 6% cash back
  • EcoTech Marine, NYOS, and Aqua Illumination
    Earn 1 reward point for every $1 you spend to get 1% cash back

You can also get bonus reward points by purchasing select items during special sales and promotions.

Learn More About Rewards