While we have discussed atmospheric CO2 levels in a ridiculously long thread immediately abandoned by its creator, somehow I did not realize that CO2 is measured by parts per million, not percentage.
I read elsewhere that too much carbon dioxide makes water acidic and plants may not create oxygen fast enough for their own needs. I also read that more CO2 will help plants grow, but without increasing other nutrients, they will be deficient.
This page states "Ambient levels of CO2 hover around 400-500 ppm. When you increase that level to around 1,000-1,500 ppm, you will see an increase in your yields and your plants will be much healthier."
https://www.maximumyield.com/what-ar...ying-it/7/2610
Is this science fair material?