Chapter 13

 

     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.