Exhale CO2 bags any good?

I was thinking of buying one and putting it in front of my intake fan for my small tent. Does anyone have any experience with these co2 bags? Exhale co2 bags
Just get you a couple 2 liter bottles- Add 4 cups of sugar to each...Buy some yeast (small packs) add 3/4 hot water, and you have C02 my brother...For around 4-5 bucks . Just screw the lids back on when lights get ready to go out...More c02 = just shake the bottles up...You will need to change every 2 weeks or you will have wine..lmao
 
Just get you a couple 2 liter bottles- Add 4 cups of sugar to each...Buy some yeast (small packs) add 3/4 hot water, and you have C02 my brother...For around 4-5 bucks . Just screw the lids back on when lights get ready to go out...More c02 = just shake the bottles up...You will need to change every 2 weeks or you will have wine..lmao

Is it bad to give the plants CO2 at night? or just that they don't use it at night?
 
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