no need to build a machine room that means it can save much construction cost and also space. it’s also eco-friendly to the environment. and it can help to make the pool being more beautiful and integral. and this filter is very easy to install. making a hole and put the filter underground, connecting the power, and installing the pipes, it can work. using sand filter as filtration system can clean swimming pool water well. sand filter is traditional filtration type, and many people like this kind filter. beside basic equipment, in-ground filter also can add some options like salt chlorinator, ph and orp controller, uv light……there are many different sizes, designs, and material filters. different sizes have different flow rate to match different size pool.