For animated diagram of how to do this see Animations page.

(Click the link above.)

Materials:
- Small mesh drawstring bag
- 12 film cans for samples
- dissolved oxygen testing kit from pet store

Method:
1. each of us will tuck a mesh bag inside our BC or wetsuit with 4 film cans in each
2. fill up two film cans with water, every sixteen and a half feet
3. carry back up to surface to test the water

For testing the water with chemical kit:
1. measure exactly 15ml of water from each depth
2. add 5 drops of the first two chemicals
3. shake the mixtures
4. let the mixtures sit for 5 minutes or until residue forms on the bottom
5. add 5 drops of the third chemical to each container
6. record the percentage of oxygen corresponding to the color that the water appears (use color chart to know the percentage)


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