Flow through filters also known as gravity filters are suitable for medium sized to large ponds or koi ponds.
Flow through filters stand above the water surface at the edge of a pond or above a water coarse so clean water flows back into the pond under gravity, they are available in a range of sizes and are easy to clean and maintain.
Note.The filter system needs to circulate the total pond water volume at least once every 2 hours with fish stock.
Calculate your pond water volume in order to select optimum filter size click HERE
MultiClear Set 5000
MultiClear Set 8000
PondoClear Set 4000
Good value, around 20% cheaper than the garden centres around here and delivery in 3 days.
Mr Christofi, Essex