77914

Watermark Professional Secchi Disc Kit

Watermark Professional Secchi Disc Kit

Description

This professional 20cm diameter secchi disc is made of polycarbonate with black and white quadrants.

Features

  • Includes detachable 24 oz. zinc sounding weight.
  • Silk screened black and white quadrants
  • 20cm diameter polycarbonate disc
Your Price
$133.48
Usually ships in 3-5 days

Shipping Information
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Details

The WaterMark professional 20cm diameter secchi disc is made of polycarbonate with silk screened black and white quadrants.
Notable Specifications:
  • 20cm diameter polycarbonate disc
  • 24 oz. zinc sounding weight (detachable)
  • 20m length of calibrated polypropylene line at 0.5m graduations
What's Included:
  • (1) Secchi disc
  • (1) 24 oz. zinc sounding weight
  • (1) Hand reel
  • (1) 20m length of calibrated polypropylene line at 0.5m graduations
Image Part # Product Description Price Stock Order
Watermark Professional Secchi Disc Kit 77914 Professional secchi disc kit, heavy-duty
$133.48
Usually ships in 3-5 days

In The News

Secchi Dip-in encourages citizen monitoring this summer

A monitoring initiative named for Secchi disks encourages people across the world to test the water nearby from the end of June through mid-July. It’s called the Secchi Dip-in and its organizers want anyone with the means to test their local water to do so and report back.  The database is open to contributions from June 29 through July 21. Volunteers, monitoring groups and professionals alike can contribute data to the Secchi Dip-in database.  Turbidity data is the main information Secchi Dip-in organizers want to see, but they won’t turn down any kind of water quality data people contribute. They encourage interested environmentalists to go out with someone who is experienced in testing for water quality to ensure data is accurate.

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Lake Michigan Yellow Perch Bounce Back After Commercial Ban

For decades, commercial fishing for yellow perch was allowed in southern Lake Michigan. This persisted until 1996 when it was outlawed, giving perch stocks there some time to recover. Scientists had for some time assumed that this fishing ban would not affect the reproduction cycles of the perch quickly and that they were going to need a long time to revert back to the cycles they relied on before commercial fishing ever started. But new research led by scientists at Purdue University finds that maturation schedules of yellow perch in southern Lake Michigan are much more resilient than had been previously thought possible.

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Colorado River Fish Contain Levels Of Selenium, Mercury

Largely seen as pristine and relatively untouched by human activity thanks to its protected status, the portion of the Colorado River flowing through Grand Canyon National Park is anything but, according to recently published research. This is evidenced by high levels of selenium and mercury found in the fishes there. Scientists from many institutions were involved in the years-long work, full results of which have been published in the journal Environmental Toxicology and Chemistry. It was led by the U.S. Geological Survey, but perhaps the contributors from Idaho State University got the best end of the stick. They were looking into the food webs of the river to evaluate concentrations of selenium and mercury gathering in fish.

Read More