Plastic D-518 Fish Tank CO2 Regulators Counter Mini Bubbler Aquarium Carbon Dioxide Diffuser CO2 Bubble Counter Aquarium Accessory

Specification: Color: Clear Material: ABS Size: 3.5 x 2 x 6.5 cm / 1.38 x 0.79 x 2.56 inch (appr.) Features: Accurate, easy to read. Compact and elegant shape. Durable and environmentally-friendly material. Can be installed inside and outside the fish tank. Used in conjunction with carbon dioxide systems. Instructions: The device is used as a reference for adjusting the CO2 size in a place where the CO2 cylinder is easy to observe. Inject 2/3 of the water into the water before use to observe the rate of the gas. Can be hung on the side of the cylinder or fixed with a suction cup. Package Included: 1 x CO Bubble Counter 1 x Sucker