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The Vandorn bottle is used to obtain water samples at selected depths. Alaska Sea Grant Marine Advisory Program Aquaculture Specialist, Ray RaLonde demonstrates how to use the device.

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The further we through the vandorn bottle the colder it was. The celsius would drop down because the sun rays wouldn't heat the water in the bottom. The vandorn bottle would go to the depth you lower it to and collects only the water in that depth only

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So the way the bottle works is that we can't use a regular cup is because it would not only collect the water from a specific depth but from the surface so that's why we use the van dorn bottle. To use it you have to get the ends of the wires on the sides and hook it to the metal bar next to the white box. So what this does is it opens the van dorn bottle to allow the water to go in. Then we throw it into the water to the depth we want to test. Then we get the metal ring called the messenger and throw it down the rope to close the van dorn bottle. What the messenger does is pushes the trigger which releases the wires to trap the water in then we pull it up to test the water

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the ph levels we found were
0-9.6
2-19.2
4-9.7
6-9.2
8-9.2
10-9.1
12-9.2
14-9.6

This scale helps scientists to see if the water was in good conditions for the fish.

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To collect the water we use a vandorn bottle and we would  throw the bottle and then we  would send the messanger and that would close the bottle and then we would have to pull up the vandorn bottle fast to get the water because the water would get out.