i grow chronic mr green swears by spraying with soda water and hes a pro only can spray in veg
check himout on youtube
Ive saw everything mr green has ever published,i never said it was bad either,99% of the reason most noobs have a hella hard time with their first few grows is that they try & do too much,this leads to a complicated grow,it also leads to confusion,a new grower should stick to the bare essentials not advanced methods,the biggest hurdle a new grower has is to finish their first grow with healthy plants & harvest buds,after that is when things like supplemental co2 or advanced techniques should be thought about.
We see new growers here all the time using shake n bake home made co2 devices when they have not even completed a grow,then later on in the grow their freaking out with problems,you ask them to give all the details of the grow & the more you talk with them the more we find out they are doing everything they've ever read or heard about growing weed,they spray epsom salts on the plant,spray soda water,foliar feed,lighty candles in the room,use fox farm nutes & soil & in the end have done so much there is no way to fix the multitude of problems.
If your a new grower reading this the best thing you can do is to stay away from any of these treatments,no matter what is on a youtube video,keep it as simple as possible & you will harvest good buds,or try t speed up the process & most likely end up with problems.