DIY CO2 Valve Diffuser Aquarium Supply Fish Tank Water Grass Homemade Carbon Dioxide Generator Kit With Pressure Air Flow Device

product description:
Aquarium Co2 System Brand new and high quality
Aquarium Co2 Diffuser Easy to set up
CO2 system is designed for low cost planted use.
What do you need to prepare for this systems?
below(not included)
2x 2 Litre of Coka Cola plastic bottle
1x 200g of Citric acid or 200ml of vinegar
1x 200g of baking soda
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.
Note: 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.
DIY AQUARIUM CO2 SYSTEM REGULAR KIT
Package included:
1 * needle valve
1 * pressure gauge
2 * bottle caps
CO2 tubing