?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>Professional pressure guage</strong> for safe-area indication£¬ pressure watching.<br><strong>Decompression automatically </strong>for safer usage and operation.<br>Cheap£¬ simple to create pure CO2 constantly by chemical reactions.<br><strong>With adjustble air flow vavle </strong>to control CO2 volume easily.<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: ABS Plastic + Stainless Stee<br>PU Connecting Pipe Lenght: 160cm / 62.99in<br>Item Weight: 143g / 5.01oz<br>Package Size: 18.5 * 13 * 4.5cm / 7.28 * 5.12 * 1.77in<br>Package Weight: 200g / 7.06oz<br><br><strong>Package List:</strong><br>1 * CO2 Generator Kit<br>1 * English User Manual