CO2 to roots?

I know this is a relatively old discussion but....how did you go with the CO2 experiments? I've set up two tents and am waiting for my seeds
but I am trying to avoid getting the old school gas canisters & regulator. So I've ordered som CO2 Pads Junior and I've seen a few alternatives e.g. MyCO2 boxes, the small CO2 bottles with refills, etc.
Has anyone tried anything successfully? The marketing blurb sounds pretty convincing but I really want real reviews by real growers!
 
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