Neutro CO2 Liquid Carbon - Medium

  • Stock: 3755 units in stock
  • Dimensions: 1000ml
  • Model: NCOM
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Neutro CO2 is a liquid source of carbon for the planted aquarium.

For those of you not familiar with it, carbon is essential for all healthy plant growth and can be provided via gas, or  liquid. The liquid form is not as potent as the gas but is still very effective. It won't make your plants pearl (this is when you see O2 bubbles coming from the plant) but it will help them grow. Plants that have access to liquid carbon will do far better than those without.

In addition to this, if you over dose Neutro CO2, it can have a negative effect on algae (it helps reduce it). However you need to take care when overdosing, and increase it slowly. Perhaps 25% extra, then monitor the results. We do not recommend more than double dose.

It is also possible to spot treat plants or wood that have algae growing on them. Simply by using a pipette and extracting some Neutro CO2, squirt the carbon onto the plant or wood when it is outside of the water. Wait for 10 seconds then put it back into the water. You can also do this when performing a water change (it's easiest that way). But if you leave liquid carbon on for too long you will kill the plant.

DIRECTIONS: Add 5ml per 250L every day. It doesn't matter what time of day you dose this product, but it does need to be added every 24 hours.

Bottle sizes: Small = 500ml,  Medium = 1000ml,  Large = 2000ml, XLarge = 4000ml.

This bottle has a cap which measures 10ml. In order to dose you can pour directly into that or use one of our dispensing bottles (which is on the better together promotion on the right hand side of the screen).

by Roger P. on 22/3/2017

easy to use , and after a couple of weeks , No fast die back, as usually happened after earlier plantings thinking about starting over and using substrate as well .

by Gareth W. on 9/10/2016

I use Neutro CO2 even though I add CO2 to my aquarium. It keeps the algae at bay and there is a noticeable difference to the growth rate of my plants when I add it regularly. Great service from AE

by John B. on 6/10/2016

I have noticed a improvement in my plants within a matter of days. So easy to use and great value for money compared to other Liquid Carbons on the market

by graham h s. on 30/9/2016

Fast service , well pleased with this product , just about to some more, recommended

by Ivor Gray on 29/8/2016

First time trying Liquid Carbon and appears to be sorting out my hair algae problem

by graham h smith on 25/8/2016

Well pleased with this product,10/10 recommended, will use again G h smith

Ask a question about this product
Every time i use Neutro the water goes a litlle bit cloudy. it takes about 24 hours to clear. is this normal? my tank 120L co2 i use 10ml every 24 hours sorry forgot about email

You must be using a buffer like RO right. This will create cloudiness with fertilisers with iron.

Hi,do your co2 liquid go out of date? If so when? (1000ml)

No they don't go out I date.

do i need to take any activated carbon out when using this product

In any planted aquarium, activated carbon needs to be removed

Hi, im starting to use the Neutro Co2. But the instructions are fairly vague about using it as an anti algacide. How much should i be dosing for a densly planted 60l aquarium ?

approx 1ml for a 60l tank per day.

Is this product known to affect Vallis in the same way that Flourish Excel does? Thanks you


Yes - all liquid carbons work in the same way

Can you use this product with red cherry shrimps?



Are there any plants or fish that you wouldn't use this product with?


Yes - vallis and riccia

Can I use Neutro T and Neutro CO2 in my 160 litre planted tank. If so, how much of each should I be dosing


Yes. Dosage is in description and on bottle.

Why do I need to remove my carbon from my planted tank if using this.


Because a carbon filter removes everything from the water

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