CO2 plays an indispensable role to the photosynthesis of aquatic plants, but the aquarium can not provide a genuine environment for plants' growing, so it comes even important for adding adequate amount of CO2 to the aquarium.

Example of Material Proportion (2L coke bottle, baking soda+citric acid):

Bottle A: 200g citric acid+600ml water (1:3)⇒shake until well mixed
Bottle B: 200g baking soda+800ml water (1:4)⇒shake until well mixed

Installations and Operations:

Turn off needle valve and connect to diffuser, check if any loose parts
Connect A, B parts with bottle A and B
Turn on the needle valve and adjust
Do not screw off the bottle cap directly for decompression or stopping reaction
Emergency Treatment: Turn off needle valve and disconnect the tube from the end for air out

Package Included:

1 x Pressure gage
2 x Bottle Cap
1 x control valve
Tubing (6mm outer diameter)

• Easy operations, great DIY enjoyment, perfect CO2 generator
• Pressurized CO2 System Includes: Caps, needle valve, 3-way connector, check valve, tubing, pressure gage
• Equipment Required: 2 x carbonated beverage bottles, reaction material and diffuser (need prepared by users)
• Recommended Reaction Material: Baking soda+citric acid / alum+baking soda / acetic acid+baking soda, etc