The OASE foam bubbler 55-15 E is an air-water foam nozzle. The 1 ½" stainless steel attachment nozzle can be used regardless of the water level. It is particularly suitable for shallow water zones and smaller garden ponds. The intensive turbulence with air provides the water with plenty of oxygen. The OASE foam bubbler 55-15 E is suitable for OASE Aquarius universal water feature pumps 21000 – 40000. Water feature height varies depending on pump performance (e.g. Aquarius Universal 21000 height 170 cm).