Menolana Water Plant CO2 Bubble Counter Non Return Multifunction for CO2 Generator Regulator Devices CO2 Portable Double Head.This Aquarium CO2 Bubble Counter with Check Valves is designed specifically for CO2 Regulator Systems, serving as an essential tool to ensure a aquatic environment.Double head bubble counter features a built in check valves that effectively prevents liquid from flowing back when the pressure changes, ensuring that the water plant table and CO2 bottle are not damaged.The CO2 Bubble Counter is detachable, making it easy to clean and maintain.Clear tube designs of the bubble counter allows for easy counting and measureing of CO2 bubbles, providing great control over CO2 output, Gas pipe installed at both ends.This Aquarium accessory is easy to install and operate, making it a user friendly addition to any CO2 Regulator System.Aquarium CO2 Bubble Counter with Check Valves. Water Plant CO2 Bubble Counter Double Head. Non Return Bubble Counter Tank Tool. Aquarium Air Pump Accessories Pet Supplies. Accurately Measures CO2 Planted Aquarium.