The pond bossŪ Waterfall Spillway and Filter seamlessly adds a waterfall to your pond. The spillway is easy to install and adds a dramatic effect. It mounts to any liner and is made with durable UV resistant high impact plastic with connections on the back for tubing. The waterfall contains additional filtration with BioBalls and a filter pad that clears the spillway of debris. The spillway is designed to be easily disguised so you can create a natural looking waterfall for your pond or disappearing water feature. For best results pair with the pond bossŪ Pond Skimmer.