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Home » Aquarium Supplies  » CO2 Systems & Accessories  » CO2 Accessories  »  Red Sea CO2 Indicator
Red Sea CO2 Indicator

Red Sea CO2 Indicator

Average Rating 4 7
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Red Sea CO2 Indicator Information

When carbon dioxide (CO2) levels are too low in an aquarium, plants inside it will be greatly affected. Once the plants are affected, it will not be long before fish and corals that are also inside the tank get affected, too. Remember, plants give off oxygen which fish and corals need to live, but plants can only give off oxygen if they have CO2 to use up to begin with.

The first step in making sure that your aquarium has ample CO2 supply is being able to know its CO2 levels whenever you want to. This is where indicators come in. Indicators can tell the you the CO2 levels of your tank, and from there, you can do the necessary next steps.

An example of an indicator is the Red Sea CO2 Indicator from Pet Store. This device can monitor freshwater tanks and give off results in real time, so you'll only get the latest readings no matter when you take them. It also displays the readings in an easy-to-understand visual that has a corresponding qualitative interpretation. With just one glance, you'll be able to tell right away what the CO2 levels are in your aquarium. You will never have to deal with hard-to-read results that could lead to inaccurate readings.

The Red Sea CO2 indicator will turn blue if there's a lack of CO2 in the water. It will gradually turn to green as the amount of CO2 increases.

Real time CO2 monitor for freshwater aquariums

The Red Sea CO2 indicator gives an easy to read, continuous, qualitative visual indication of the current CO2 level in a freshwater aquarium.

Manufacturer Info

Red Sea is widely recognized as a leading innovator and manufacturer of quality products for aquarium hobbyists. With a dedicated team of chemists, biologists and other professionals, 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 & MAX-S aquariums- The only choice for true Plug & Play™ coral reef aquariums.

The MAX-S now features Red Sea’s new Reef-Spec™ T5 lighting, which provides outstanding results for lps and sps corals and which is now available as a stand-alone product range with wattages from 24-80w.

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.

Red Sea’s portfolio also includes the C-Skim 1800 protein skimmer and a range of electronics such as the AquaZone range of ozoniser/redox controllers.

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

Red Sea CO2 Indicator Reviews

Average Rating
(7 reviews)
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co2 indicator

Reviewers Rating Great

Posted: 10/21/2012 from WINTER GARDEN, FL UNITED STATE
4.0 5
Experience Level: Intermediate

Comments: Work's well.

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Red Sea CO2 Indicator

Reviewers Rating Average

Posted: 12/4/2011 from BELLEVUE, WA UNITED STATES
3.0 5
Experience Level: Intermediate

Comments: Ok, well the c02 indicator and 02 hose got here very fast, as far as the indicator goes I realy ccant tell at this point if its workng right or not, from what I have been reding PH, and other tank perams can have a big efect on it. As I understand it its best to use a 4dhk water in it and then ad the provided solution. I dont have any of that, I also read to get the PH where you want it and ten add it from the tank, so thats what I did and its redding that every thing is fine, My tank runs on the acidic ide also I have a ongoing ammonia problem that I cant shake. Its easy to use, easy to set up and every review I read on them was gait thats why I bought it, so Im sure that if its not exactly right, Its my fault .. its also very inexpensive so get one and give it a shot its at the very lest better than not having any idea of how much c02 is in the water... the reason I gave 3 stars insted of 5 is I cant be sure if its all good or not, and again .. if not I bet its my fault... so go buy one.....

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Does a good job, but...

Reviewers Rating Great

Posted: 2/6/2011 from WASHINGTON, DC UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: It works, and does a good job, the advantage of the bright white plastic is it's visible (from across the room, LOL) and easy to read.The disadvantage is the bright white plastic is gaudy and in a green lush aquarium, looks out of place - I was originally looking for a glass indicator because they look a lot better in a planted tank but no luck. The only caveat is the instructions, they require you to use aquarium water and I've been told by almost every planted tank expert that you need to use 4dKh standardized water because aquarium water may have buffers and may not be 4dKh as necessary to make the indicator accurate. You can do an online search for 4dKh and you'll see a number of posts in online forums.

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Safe Bet

Reviewers Rating Great

Posted: 6/27/2010 from FLORENCE, SC UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: Works well for quick Co2 checks. It can be a bit of a hassle to get it put back together but this insures that it does not fall apart while in your aquarium. I think that this is a must for someone who does not have the time for constant Co2 checks or the money for a monitor/controller.

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Better than the Azoo

Reviewers Rating Excellent!

Posted: 3/18/2010
5.0 5
Experience Level: Intermediate

Comments: I got this one after I had issues with the Azoo CO2 indicator. I had lots of problems with the Azoo especially with it leaking and having trouble with the provided suction cup staying attached to the glass. The Red Sea is much easier to use. It also requires less indicator drops per application than the Azoo. So far there have been no leaking or any other problems with it. Thank you guys for the great service.

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Difficult to close

Reviewers Rating Average

Posted: 4/28/2008 from JERSEY CITY, NJ UNITED STATES
3.0 5
Experience Level: Intermediate

Comments: Hard to close once refilled.

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Red Sea CO2 Indicator

Reviewers Rating Great

Posted: 3/9/2008 from DETROIT, MI UNITED STATES
4.0 5
Experience Level: Intermediate

Comments: Extremely easy to use.

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