Pssopp Fish Tank CO2 Needle Check Valve Stainless Steel Aquarium System Regulator Bubble Counter DIY Generator Valve(03#)

【Easy to Install】Ergonomically design, easy to install and convenient to remove. 【Different Styles for Choosing】Different styles to choose, meeting your different demands. 【High Precision】Aluminium Aquarium Inline CO2 Bubble Counter with build in check valve. When the regulator is open, you will be able to calculate your CO2 injection rate by counting how many bubbles pass through the counter per minute. 【Easy to Operate】Simply unscrew end and fill the bubble counter with water, or if you prefer a bright coloured solution to make it easier to read. 【High Quality】This tool is made of high grade stainless steel material, which is anti-corrosion, abrasion resistant, glossy and Special metal-grinded surface, light weight, easy to operate.