Chapter 13
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Some growers spray
their plants with seltzer water. This drink is composed of water and CO2
and the CO2 is released as the water evaporates. This practice could get
expensive with a large room full of plants, especially considering that,
in order to produce measurable results, the CO2 should be replenished
every hour or so. (This, of course, could lead to mold and rot, especially
if the grower is producing flowering plants that are approaching
maturity.)
If this method really appeals to you, consider an old-time seltzer bottle. Water is put into a reinforced bottle equipped with a holder for a small CO2 “charger” of the type used in a BB gun. The released gas carbonates the water (adds CO2) and also provides pressure to squirt out the liquid when the valve is opened. A seltzer fanatic could pre-mix fertilizer, hormones, or cloning solution in the bottle.
A variation of this method is practiced by some commercial growers, who report higher yields. CO2 is bubbled through the
nutrient solution tank prior to a watering cycle.
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