Lake Learning column: Monitoring water clarity
Did you know that the easiest, most inexpensive way to monitor water quality in a lake is with a simple white disk? This type of water monitoring is free. The measurement tool is called a Secchi disk. It is a metal disk, 8 inches in diameter that has a cord attached to the middle. This cord has 6 inch increments marked on it. Each foot is marked in black, while each half foot is marked in red.
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