Features - Efficient, compact CO2 supply - Effective dissolving of CO2 - Integrated bubble-counting function - Automatic waste gas venting How it works: The CO2 supplied by the CO2 fertilizer system escapes into the bottom of the Flipper from the opening of the CO2 hose. The CO2 bubbles rise up the channels of the Flipper very slowly. In the process, the CO2 dissolves in to the aquarium water. This is why the bubbles get smaller the further they rise. The amount of CO2 supplied can be calculated by the number of bubbles per minutes. CO2 Flipper are extremely effective: Due to the very long route the CO2 has to travel, the bubbles have plenty of time to dissolve - despite the unit's extremely compact design. Automatically waste gas venting Waste gases are considerably lighter than the relatively heavy CO2 and therefore gather at the top of the collector. Here they are drawn off automatically on a regular basis using the specially developed waste gas vent. Sizes - Nano-Flipper - up to 10 gallons - Micro-Flipper - up to 15 gallons - Mini-Flipper - up to 40 gallons - Flipper - up to 75 gallons - Maxi-Flipper - up to 150 gallons