Pebble is able to boost up the appearance of the park in our shelter. But if it is used for the long term what should we do to keep it away from dirty or mose? To take care of it is not a hard thing to do. For more information please don't hesitate to contact us : Email : marketing01@gosindo.com, marketing02gosindo.com. Phone : +6231 7319898 Official Website : www.gosindo.com