Quote Originally Posted by mlwjr69
i am spraying them by hand twice a day for about 20 seconds with a co2 tank.
A 'quick' bump in CO2 might be a bonus...for about 10 seconds. After that, it mixes with ambient air, and the concentrations are watered-down with every cubic foot of fresh air from the intake.
But an over-concentrated dose might also fry the plants ability to 'breethe'. If you have no way to monitor ppm, I'd ditch the CO2 for now. At least till you get 'em healthy.
Read-up on the proper use of CO2 before continuing it's use.

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