This brings me back to the good old days of Biology at St. Peters College in Adelaide.
Our teacher use to remind us all that for a plant to grow it needs CO2. CO2 is critical to plant growth and development. Photosynthesis, the process through which plants use light to create food, requires Carbon Dioxide.
CO2 concentration in ambient air ranges from 300-500 parts per million (ppm), with a global atmospheric average of about 400 ppm. If you are growing in a greenhouse or indoors, the CO2 levels will be reduced as the plants use it up during photosynthesis.
By increasing the CO2 levels in these environments you will see results with higher yields and fruit.
Research suggest that by raising the CO2 level by an extra 1500ppm increase yields occur by about 50%.
Many commercial growers in the United State have increased CO2 in their indoor gardens and seen numerous benefits. Australian wholesale commercial growers are starting to introduce CO2 into their greenhouses and seeing larger fruit and healthier plants.
Keep in mind that there is no point pumping large amounts of CO2 into your room if it escapes easily. When you are growing indoors you should always check your room for leaks. It is very important to ensure that these leaks are sealed and your greenhouse is airtight.
Another thing to note is that during the night cycle plants actually give off CO2. This causes a gradual increase during the night, until the lights come on and the plants resume absorbing CO2; you can save CO2 by waiting an hour or so into your daylight cycle to cut your CO2 device on. If you need help with purchasing this equipment Shane from Hobby Hydro and Home Brew can arrange this for you.
Finally, CO2 is significantly heavier than air, so it is essential that your CO2 be dispensed from above your plant canopy. We suggest using a oscillating fan to move the airflow in your indoor garden.