Pumping air into a CO2 diffuser?
Hi, I have a 3 liter bowl for snails and low requirement plants, it has no filter. And was wondering if adding a CO2 diffuser (to get fine bubbles) but pumping just air through it would have any effect on plant health or if it would be better to just add an airstone. Thanks for your opinions
Edit: The point being favoring gas exchange and air harnessing by the plants, I would like to know which of the two would be better for the tank overall