Atlantic Water Gardens’ Splash Mat for 12-inch Formal Spillways Basin CFBASIN12 reduces splash for Atlantic Formal Spillway waterfalls. This anti-splash mat fits perfectly on the top of the basin and aids in filtering water before entering the basin to eliminate debris from entering the pump and spillway. The Splash Mat reduces water loss from the reservoir by absorbing water from the spillway waterfall, such as a Colorfalls, Scupper or Wall Spout and returning it to the reservoir basin.