CO2 addition device for freshwater aquariums. Compact and clear design. Made from shatterproof acrylic glass. Ceramic disc for very fine atomization. For CO2 hoses with a 4 mm inner diameter (6 mm outer). With integrated bubble counter. Range: 200 l. The Dennerle CO2 Diffuser Ultra M is the perfect solution for all aquarium enthusiasts looking for an effective and discreet method to provide CO2 for their aquatic plants. This unique device is ultra-compact and can be installed invisibly in the aquarium using the included suction holder. However, the attractive appearance of the diffuser ensures that it does not disrupt the visual area of the aquarium. What makes this diffuser special are the newly developed membranes made from a special sintered material with extremely small pores. This creates a nano-atomization of the supplied CO2, allowing for highly effective and safe dissolution of this essential plant nutrient in the aquarium. Thanks to the integrated bubble counter, you can easily monitor the CO2 addition rate at any time and adjust it to the needs of your aquatic plants. The CO2 Diffuser Ultra M is compatible with all common CO2 systems, including Dennerle's single-use and multi-use systems like Carbo START, Carbo POWER, and Carbo NIGHT. Additionally, due to its low operating pressure of approximately 0.3-0.5 bar, it is also ideal for bio CO2 systems. With a hose connection suitable for all standard CO2 hoses with 4/6 mm, the diffuser can be easily integrated into your existing aquarium system. With the Dennerle CO2 Diffuser Ultra M, you achieve optimal CO2 addition in aquariums up to 100 liters. This size makes it particularly popular for use in nano aquariums. Ensure healthy and vibrant aquatic plants in your aquarium with the Dennerle CO2 Diffuser Ultra M.