【Allows You to Control the Amount of CO2 in the Tank Water】 - The durable and safe CO2 bubble counter is used in conjunction with the water grass meter, it can be clearly seen that the amount of CO2 released by the gas produces sufficient CO2 for the water. 【Keep Fish and Plants Healthier】 - As you know, excessive or insufficient CO2 concentrations in the aquarium water can cause excessive stress to fish and plants, and too much CO2 in the water can cause the pH level to drop. However, our bubble counter makes aquatic plants happier, healthier and brighter, and grow faster. 【Easy to Read】 - The transparent design of the meter makes it easy to view the bubbles, allowing for effective determination of the number of bubbles per second. Bubbles are created by CO2 gas in the water; the more bubbles there are, the more CO2 there is. 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