The present invention relates to a filtration system for purifying water,
in particular aquaculture water. Furthermore, the invention relates to a
method of purifying water wherein water is supplied to a filtration
system, comprising filtration medium for filtering water and a grid for
preventing water channeling within the filter wherein said grid comprises
means for allowing passage of said filtration medium through the grid,
and a water recirculation system for purifying contaminated water from
aquaculture and recirculating purified water to the aquaculture.