?Do you want to make CO2 yourself for your fish tank? This kit will be a good choice. It is easy£¬ safe to operate and can create CO2 constantly by the reaction of citric acid and soda. With it£¬ you can make CO2 at home conveniently.<br> <br> <strong>Features:</strong><br> <strong>Fully installed£¬ direct to use</strong> and labor-saving.<br> <strong>Well-sealed caps &amp; pipes£¬ leak-proof£¬ non-deformed£¬ never loose.</strong><br> <strong>Specialized pressure guage </strong>for safe-area indication£¬ pressure watching.<br> <strong>Automatic or manual decompression</strong> for safer usage and operation.<br> Metal <strong>air flow adjustment vavle is preciser</strong> than normal plastic product.<br> Cheap£¬ simple to create pure CO2 constantly by chemical reactions.<br> <br> <strong>Note:</strong><br> 1.Don't open bottle directly when there's still on pressure£¬ please wait for its automatic pressure release.<br> 2.Please use food-grade citric acid and baking soda as the raw material.<br> 3.For more specific instructions and usage£¬ please read our English user manual.<br> 4.The initial set of safety vavle is 4kg/c?£¬ you can also adjust it manually.<br> <br> <strong>Specifications:</strong><br> Cap Material: ABS Plastic<br> Pipe£ºPU Plastic<br> Air Flow Adjustment Vavle: Integral Metal<br> PU Connecting Pipe Lenght: Approx. 1.8m / 70.87in<br> Item Weight: 170.5g / 6.02oz<br> Package Size: 24.5 * 19 * 3.5cm / 9.65 * 7.48 * 1.38in<br> Package Weight: 255g / 8.99oz<br> <br> <strong>Package List:</strong><br> 1 * CO2 Generator Kit<br> 2 * Sucker