AHHA

I’m just curious about the explanation.. I’m a biologist, but not a botanist and am always trying to learn more. I thought that plants (mainly C3) only took in O2 for photorespiration - which happens when it is too hot and the stomata close or the CO2 levels are low for another reason and photosynthesis is taking place (probably low CO2 and high light affects in aquariums?) Did that work well? I honestly just saw that this is an old thread, but hopefully you can follow up on this?