The Green Matala can follow thereby trapping a medium size particle. Both Green and Black clean out very easily by simply shaking the pieces out before draining the sump. When you use the Black or Green Matala® for solids filtering you may use the garden hose to spray clean them. The dirt falls off very easily.
A good biofilter needs a lot of surface area with open spaces between for good aerated water flow. A high surface area is useless if the passageways are so small that water flow cannot penetrate.
R-Matala will naturally wedge in place without any need for support. Four sequential densities can be perfectly employed to achieve maximum solids / bio-filtration. Each roll is 6 inches thick with a tremendous potential to trap dirt and yet is super easy to clean. Simply drain the waste out your bottom drain and gently pour pond water over the R-Matala
R-Matala, the perfect "drop in" media for Vortex filters and barrel filters. R-Matala has the same qualities as the sheets of Matala but formed into 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 coils are not designed to be un-rolled. They are pre-cut to fit your tank.