national monument. noun. Definition of national monument for English Language Learners. : a place (such as an old building or an area of land) that is owned and protected by a national government because of its natural beauty or its importance to history or science. Britannica.com: Encyclopedia article about national monument.
Brown or discolored water is caused by minerals, sediment, or rust that may accumulate in the water mains over time. When the water from your tap is brown this indicates a disturbance in the water main that stirs up these deposits.
You have hard water, that will distort the color of your pool real easy. Have someone come and fill your pool with anything other than the water that you have already used. I am experiancing the same problem with brown water. Come to find out that the clorine oxidizes the Iron in Well water turning it brown. There are chemicals that you can get at the pool supply store that will help.