1. Stone Cast Fountain Care and Maintenance Do not use any corrosive chemicals as this might corrode the outside surface Stonecast objects experience natural aging which to most adds distinctive appeal Sealerspray applied annually will restore any lostluster Clean with ordinary water and brush when necessary to remove dirt and grime During winter or cold temperature weather drain out all water and cover properly when not in use If left uncovered unprotected water in the crevices can freeze and cause outer layer to pit crumble or crack Unless properly treated all water features experience calcium buildup