DIY aquarium planted tank CO2 system kit tube valve guage bottle cap D201

Description

package includes : 1 needle valve 1 pressure gauge 2 bottle caps with tubes 1 extra tube 2 tube holder To building up the system, you need to prepare some materials below (not included): 200g of Citric acid powder or Vinegar(not included) 200g Baking Soda powder(not included) 2x Soft drink 2L bottle(not included) Tips to install: the bottle must be carbonated beverage bottle, do not use pulpy, green tea, mineral water bottles, etc. trimming valve regulation avoid by sudden big or small, can't suddenly turn up, after immediately shut down again, so as not to cause abnormal pressure to the bottle. Pay attention: Make sure carefully observe the direction of the parts before assembly. The usual wrong handle way will cause abnormal reaction components as follow: the contrary direction of the check valve and fine-tuning in the direct