Item type: CO2 Generator DIY Kit Material: aluminium alloy Color: As picture shown Special pressure gauge: Tailored for the aquarium low pressure! Special pressure gauge with safety zone indication and scale! It is convenient to clearly observe the pressure of the start-up reaction and improve the success rate of the start-up; accurate pressure gauge, accurate to 0.02 MPa. No-return bubble counter: Internally designed check valve 1. Metal material at both ends, completely eliminate the softening and breaking of plastic stoppers of similar styles; 2. High-grade thick acrylic wall, clear bubble, safe and high pressure! Micrometering valve: Upper opening design for easy connection to the bubbler 1. Metal body, sturdy and durable! 2. The internal valve needle is made of copper. 3. Nut lock design, completely prevent leaks! 4. The upper opening can be connected to the bubbler and the solenoid valve, and the fine-tuning valves on the market are basically side-exhausted. 5. The trimmer valve can be removed and cleaned, even if the trimmer valve is blocked, it can be easily handled; Generator body: Aluminum alloy material, instead of the cumbersome air pipe, the pipeline is treated with corrosion resistance and acid and alkali corrosion resistance. Hard surface oxidation treatment, long service life. Instructions Add materials in the first step A bottle: + citric acid 200g, +600ml water dissolved B bottle: + baking soda 200g, +200ml water shake The second step generator connects the bottle Gas volume control, clockwise off, counterclockwise on The cap corresponds to: [A bottle - citric acid] [B bottle one - baking soda] screwed into place; The third step starts the reaction to generate carbon dioxide. 1. Squeeze the A bottle vigorously to make the acid solution into the B bottle reaction; close the fine adjustment valve after the extrusion, shake the B bottle to fully react, check whether the pressure reaches 1KG. If it does not reach 1KG, please continue the second step operation. 2. Unscrew the micrometering valve to deflate. Because of the pressure difference principle, the A bottle of acid solution flows into the B bottle. According to this step, the reaction is repeated and the pressure is increased. The pressure is stopped at about 1KG. [Shake the B bottle properly to accelerate the reaction] * When the pressure returns to the A bottle, it will be strong. Don't worry at this time, it is normal; 3. The starting pressure is best around 1KG; the working pressure can be maintained in the green range; the safety valve 4KG is relieved. 4. Then install the bubbler to adjust the appropriate amount of air. (Please skip this step for the non-reverse bubble counter) The use time is proportional to the amount of gas output; excessive gas production may cause fish and shrimp to die of oxygen deficiency; due to personal use methods, quality material, gas output and other factors, the data may have errors.