Matala is the first media which is actually made for the express purpose of filtering koi ponds.
Rolled Matala Cartridges for Round Filter Tanks
Introducing R-Matala®, the perfect "drop in" media for Vortex filters and barrel filters.
R-Matala® has the same qualities as the sheets of Matala in a coiled pre-cut cartridge. Simply select the diameter roll and the density you need for your round tank and drop it in. R-Matala® will naturally wedge in place without any need for support.
After the water temperature in your pond drops to 60 degrees or below, you should decrease the amount of food given to your fish and feed them no more than once a day using a food designed for cool weather feeding.