Ornamental pool filters are the systems that pass the dirty water of the pool from various filters and make it clean. To put it briefly, it can be said that they consist of filter and recirculation pump. Water passes from the filter by the help of a pump and is cleaned by this way and by the help of the same pump is given back to the pool again with a waterfall or sprinkler. The recirculation pump’s economic life becomes longer with a recirculation pump. It is not recommended to put these filters at the bottom of water. When the filter is put at the very bottom of the pool, it collects the particles there and this can cause the filter to be choked up easily. Filter should be placed near to the edge and the recirculation pump should be placed in the middle. With this positioning, the suction of the pump is made in a cleaner way. By the recirculation made with an ornamental pool filter, the oxygen level in the pools increase.  By this way, the ornamental pool is ventilated and an healty, clean environment is created to the organisms that live inside it. There are many types of filters.