Keep your pond crystal clear and reduce green water with this UV Pond Clarifier. By using Ultra Violet (UV) technology, this clarifier reduces the build-up of microbes and bacteria that are responsible for making your pond green and murky. As a result, your fish will have a healthy and beautiful pond environment to live in! This pond clarifier is ideal for ponds up to 2000-gal and is compatible with 1/2-in, 3/4-in, or 1-in ID tubing. It is recommended for use with the following smartpond pump models: DP210, DP330, DP560.