Just add citric acid, baking soda, into the bottle, can produce carbon dioxide. The plant metabolic rate can be increased quickly, create the growing conditions for fishes. It is the choice of making CO2 equipment at home.

Features:
Professional CO2 generator system with stainless steel bottle, better than simple bottle generators. It is more reliable, , and efficient.
Safety will open automatically when the pressure over the pressure.
Bubble counter with check : -rate of CO2 indication device and back into the regulator.
Solenoid : To control the on and off of CO2 generator system using with a timer(not included).
Come with a bubble diffuser, refine the bubbles and make it easy to dissolve in and be absorbed by plants. Inject to your aquarium with CO2 quickly and easily.
Large amount of CO2 may cause fish dead. It is recommended to reduce the CO2 at the beginning, 1 or 2 bubbles per second. 's reaction can last for 3 to 4 weeks using.

Note:
Excessive or double addition of materials and is prohibited.
Invert the bottle and disassembly are prohibited.

Specifications:
Main material: Stainless steel
Main color:
Voltage: AC input; output
3 size optional:
1L: Height: 22.5cm; diameter: 10cm; thickness: 0.12cm;
2L: Height: 47cm; diameter: 10cm; thickness: 0.12cm;
5L: Height: 47cm; diameter: 13cm; thickness: 0.15cm;
Package size:
1L: 34*12*12cm / 13.4*4.7*4.7in
2L: 48*12*12cm / 18.9*4.7*4.7in
5L: 50*14.5*14.5cm / 19.7*5.7*5.7in
Package weight: 
1L: 1000g / 35.3oz
2L: 1705g / 60.2oz
5L: 2705g / 95.5oz

Package List: H26191-5-
1* Stainless steel bottle
1* Solenoid  (1L Not included)
1* Bubble diffuser 
1* Pressure reducing
1* Bubble counter with check
1* Filter
1* 1.5m tube
2* Suction cup
1* Manual