Description Our 6kg CO2 Gas cylinders come full. Our cylinders can be returned as an exchange/purchase of a new full one when empty. (see our guidline requiremets for an exchange under the resources tab) Features: Australian Standard Approved Holds 6kg of CO2 when full Dimensions 71cm high x 16cm diameter Black carry handle grip for easy of transport and protection of valve Growers have achieved the best success with CO2 levels between 1,200ppm and 1,500ppm. Carbon dioxide enrichment to 1,000 µmol/3m increased yields and plant dry weight of tomato plants by 30% (Slack, 1986) and 36% (Yelle et al., 1987), respectively. Cucumber (Dennis, 1980), lettuce (Knecht and O'Leary, 1983), and many ornamental species (Mortensen, 1987) also responded positively to CO2 enrichment. In an indoor space with normal fresh air ventilation, the CO2 concentration should be around 400 ppm. Warning: Only use in the upright position, or you run the risk of breaking your regulator with liquid CO2.
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