Oase Clear Water Guarantee: The above selection table advises maximum recommended pond volumes in litres and is based on the following assumptions; use of 1 1/2 inch (38mm) internal diameter hose and a height difference of 50 cms between the pond surface and the outlet hose. Pond volumes given in bold, red figures indicate these filter and pump combinations are available as matched sets at reduced prices click here or the bold, red figures to view filter sets page
1 Gallon = 4.5 litres; 1 litre = 0.22 gallons