?A complete CO2 system could be built up easily if you have owned this D201 Aquarium Water Plants Necessity DIY CO2 Generator System (Chinese Version). The CO2 generator is characterized by 2 air-pipe locks on the bottle cap which prevent the air-pipe getting loose£¬ specialized pressure gauge for indicating safe area and scale£¬ and bottle cap whose size fits common PET plastic bottle. Also£¬ it¡¯s easy to set up and safe to use. A cost-effective solution for promoting plant growing! Get it!How to use£¬ please click here: http://v.youku.com/v_show/id_XNDQxNjkxNzA4.html?from=s1.8-1-1.2                                     Features            With 2 air-pipe locks on the bottle cap£¬ prevent the air-pipe getting looseSpecialized pressure gauge£¬ so safe area and scale can be seen clearlyYou can built up your CO2 system within 15 minutes by using this complete DIY CO2 kit combo for planted aquariumThis bottle cap fits common PET plastic bottle perfectlyPromote plant growing£¬ easy to set up£¬ low cost£¬ safe                                                            Specifications            Material    Plastic    <br>Model    D201    <br>Dimensions    (6.30 x 4.72 x 1.65)" / (16 x 12 x 4.2)cm (L x W x H)    <br>Weight    5.36oz / 152g    <br>                                                            Package Includes            1 x Carbon Dioxide Generator1 x User Manual                                                            Extra Info            1.The bottle have to use carbonated beverage bottle£¬ do not use pulpy£¬ green tea£¬ mineral water bottles£¬ etc.<br>2.Trimming valve regulation avoid by sudden big or small£¬ do not suddenly turn up£¬ after immediately shut down again£¬ so as not to cause abnormal pressure to the bottle.<br>3.Make sure carefully observe the direction of the parts before assembly. The usual wrong handle way will cause abnormal react ion components as follow: the contrary direction of the check valve and fine-tuning in the direct.If you want to set up the Generator £¬you need (notincludedintheproduct):<br>1x200gofcitricacid<br>1x200gbakingsodapowder<br>2xSoftdrinkbottle (recomended2L bottle)