![Plastic Water Collection Cup with Secchi Disk at Bottom](https://etc.usf.edu/clippix/pix/plastic-water-collection-cup-with-secchi-disk-at-bottom_medium.jpg)
Plastic Water Collection Cup with Secchi Disk at Bottom
WARNING: You are about to download a 21.9 MB TIFF!
Normally such a large file is only needed for high quality printing purposes. If you are certain that you need such a large file, click the DOWNLOAD button to begin.
If you do not wish to download the large TIFF, just click the × in the top right-hand corner to close this alert.