Hozelock 1800 Air Pump - 320LPH High performance, reliable air pump for large fish and koi ponds. The use of an air pump within your pond helps to increase oxygen exchange which benefits both your live stock and your pond's filtration system. Beneficial bacteria require oxygen to metabolise. Increasing the oxygen levels within the pond, especially in the filter if at all possible, will ensure that as large a population as possible of beneficial bacteria can develop - increasing the filter's efficiency and improving your water quality. Key Benefits Include: Ideal for use in densely stocked ponds and in the summer months when oxygen levels decline Can aid the prevention of freezing by creating a strong circulation of water Type - Air Pump & Accessories Accessories Including 10m Hose, x2 Air Stone and Check Valves Maximum Output (LPH) - 320LPH Features and benefits Hozelock 1800 Air Garden Fish Pond Pump Maximum output - 320lph. Maximum depth - 1.2m. Output at 1m - 320lph/230lph Maximum pressure - 0.014MPa. Number of air outlets - 2. length of air tube - 1 x 10m. Diameter of air tube - 4mm. Number of air stones - 2. Size of air stone - 3cm x 3cm. Pump rating - 4w. Cable length - 3m. Specifications Hozelock 1800 Air Garden Fish Pond Pump Maximum depth 1.2m Maximum output - 320lph. Outdoor Rated. Maximum depth - 1.2m. Output at 1m - 320lph/230lph Adding oxygen into a fishpond is very important for fish health, particularly in densely stocked ponds and in the summer months when oxygen levels decline. Air pumps can also be used to circulate water and help prevent the pond from freezing in winter. Ideal for use as part of a Hozelock Cyprio Pond Equipment system. A solids handling pump puts solids into the filter. An Ultra Violet Clarifier (UVC) eliminates the algae that cause green water. A Filter removes the toxins and the waste making the water healthy and clean Whilst an Air Pump adds oxygen to the pond to improve fish health and activity