club soda = Co2 ???

been saving up for a whole co2 system. But in the meanwhile ive been buying carbonated club soda, putting it in a spray bottle and spray the plants 2, 3x a day. Does this have any bad effect on the plant?? or more good then bad?

Well the spray might affect the color tint of the leaves, burning them which is not what you want.

This might help you out more:

https://www.rollitup.org/newbie-central/8383-need-help-co2-vinegar-baking-soda.html