Club soda may contain sodium for taste. It also comes in at a low pH due to dissolved CO2 going into solution as carbonic acid. It is also not going to give a ton of CO2 for the money and waste. A block of dry ice in a cooler with a few holes in it would be better, or a yeast/flour/sugar fermenter in the room (put it on a tray; they can bubble up and overflow).
Cat shit has high salt and will kill plants.
Most people will not benefit much, if any, from atmospheric enrichment. If light is your limiting factor as it is with flouro growers, adding CO2 is not going to help.
stinkyattic Reviewed by stinkyattic on . Cheap alternative for supplying C02 Ok Iā??ve been lurking around the forums for a few months and have never seen it mentioned. I have heard that spraying your plants with club soda can be a cheap method to provide your plants with C02. Makes sense to me, but wanted to know if anybody has tried. Iā??m about to harvest my 1st successful grow, so if nobody has any ill words about the idea, I will experiment with my next grow. Rating: 5