This aluminium co2 diffuser is suitable for all kinds of aquariums, fish tanks and mini aquariums. The high density tank atomiser produces small bubbles to increase the rate of CO2 dissolution and the u-shaped plug tube prevents CO2 flow blockage. Easy to install, with fixed suction cups that attach firmly to the tank wall and are not easily loosened and dropped. Adding to your aquarium will not create annoying noise and will not disturb the fish. Made of high quality aluminium alloy, safe, energy saving and environmentally friendly.