Bubble Counter, Aquarium Air Pump Accessories Fish Tank Tool To Know Co2 Amount(single Head) Allows you to control the amount of CO2 in the water of the tanks- The durable and safe CO2 bubble counter is used together with the water grass meter. It is clearly visible that the amount of CO2 released by the gas produces enough CO2 for the water. Keep fish and plants healthier - As you know, amounts of CO2 Too much or too little CO2 in tank water can cause undue stress to fish and plants, and too much CO2 in the water can cause the pH to drop. However, our bubble counter makes aquatic plants happier, healthier and brighter and faster growing. Easy to read- The transparent design of the counter makes it easy to see the bubbles, allowing you thus to effectively determine the bubbles per second. Bubbles are formed by CO2 gas in water; The more bubbles, the more CO2. Once the counter is installed and connected, it's time to count the bubbles. Harmless to plants and fish- The bubble counter is made of high quality material, which is durable and reliable. Adding a bubble counter to your aquarium setup is a safe and natural way to add CO2 efficiently. Quick and Easy Installation- The bubble counter simply connects to the current CO2 diffusion tube. Fill the bubble counter with water, attach it to the tube, then use the included suction cup to attach it securely to the outside wall of your aquarium.