insane! all of this is insane!ya dont want to be spraying anything on growing bud let alone club soda which is bound to be full of sugar!,,, jeeze try coca cola itll sweeten up the bud!!!,,the carbonated mineral water i would maybe go with ,,,,but again no spray on my flowering plants especially after the first four weeks and then only for bugsthe tabs are good , but ya have to remember to circulate all that vapour rich co2 around plenty or youl get mildew,,,
seroiusly dont spray your plants with club soda!

welcome to the world of endless possibilities,,,,hydroponics!