Posted on by Jason Gibson

Carbon Dioxide (CO2) - A-Grade Hydroponics

Carbon Dioxide (CO2) is an odourless gas that is approx. twice the weight of oxygen. The main concern most indoor gardeners have when it comes to supplementing CO2 is the worry that their ventilation system will exhaust out what goes in, this isn’t true

For all trees and plants carbon dioxide is an essential Macro-element that assists photosynthesis, plants absorb Carbon Dioxide from the surrounding atmosphere through tiny structures called stomata cells.

By definition, photosynthesis is the process of using light energy to split water (H2O) and fix carbon dioxide (CO2) to form carbohydrates (CH2O) and oxygen (O2).

The ambient CO2 concentration (2017) in the atmosphere is currently around 400 PPM (Parts per million)

If the Co2 level reaches below 250ppm, Photosynthesis is stopped altogether being detrimental to your plants.

Although some species can be intolerant to CO2 most plants are able to photosynthesize more efficiently with 1600-1700 ppm of Carbon Dioxide.

Increased growth rates, growth pattern and overall vitality.

If the environment is 'dialed in' correctly and plant nutrition is understood Growth rates can speed up 30% and that is no exaggeration!

Flowering yields can increase up to 30-35% this means your flower form, structure, density and quality are much more appealing than a harvest not supplemented.

All from enriching your grow space with a crucial element, who would have thought.


So why do plants outside not need anything more than the ambient?

Because its free bound, it’s everywhere, which means it will never be depleted, its only going up (no politics here) whereas with most professional indoor environments they are generally sealed and not reliant on negative pressure to passively deliver the CO2 to the plants, basically its hugging them every second of the day!

For those in non-sealed or hobby environment/grow rooms, you can supplement Carbon Dioxide to boost your plants growth as it consumes nutrients to aid photosynthesis. With the right levels of CO2 supplementation, the speed of photosynthesis indoors can be up to 7 times as quick as outdoor, so if all the ambient CO2 has been consumed within the space and no more additional gas is being supplemented then your plants will literally stop growing.

Obviously not all gardeners can go to the lengths of acquiring CO2 tanks and regulators, luckily through innovation, some companies have created disposable products that last for a few weeks before being replaced. These can come in really handy for the hobbyist especially!

CO2 Supplements - A-Grade Hydroponics

And then there are the old-school science class ways of providing our plants much needed air source.

Vinegar & Bi-carb soda is a fairly short lived reaction, however the byproduct emitted is CO2.

Water, Yeast & sugar will last much longer than the bi-carb method, this is more of a slow fermenting method, but works quite well!

Try adding some Carbon Dioxide in your growing space today!