It is a high power CO2 diffuser 4 for the CO2 DIY system (1-2 bar) and compressed CO2 up to 300 l Aquarium Easy to set up CO2 system is designed for a low cost planted insert tank This CO2 atomizer with the construction in several funional all in one, including check valve, counter, bubble, ultramicropore atomization and the U suction air inlet is also included for the it is a high performance CO2 diffuser 4 for the DIY system CO2 (1-2 bar) and the compressed CO2 system, up to 300L Aquarium This CO2 atomizer with construction in several funional all in one, included check valve, bubble meter, ultramicropore atomization and air intakes U. suction cup shaped is therefore included for mounting The packet contains: 1pcs * 4 in 1 diffuse CO2 emissions