Hozelock 1800 Pond Air Pump - 320LPHHozelock 320 Pond Air Pump Model 1800 Pond Oxygenator with Dual Air Stones (320 LPH) Pond air pump designed to maintain healthy oxygen levels and improve water circulation in garden ponds. The Hozelock 320 Pond Air Pump delivers reliable aeration to support fish health during summer and helps prevent pond surfaces from freezing in winter. Key Features Supports fish health adds essential oxygen to pond water, especially important in densely stocked