Like it was mentioned before, I am trying to figure out what caused the drop in electrolytic conductivity in previous experiments. By accident today, I found out that the diameter of the container affected the reading on the EC meter. The narrower the container, the bigger the drop. So we put just tap water into 7 containers with different diameters. We found that the data hit a plateau after it hit more than 5.5 cm. We need to try this again with more containers to fill in the gap and better understand the shape of this curve.
Note to self: aluminum container definitely messed up the reading. (we through out that data point)
We haven't done the experiment with the sand, but we are still interested if the sand or the aluminum play a role in changing the reading in EC meter.
We also want to try the many diameters with a salty solution, closer to what they used in the previous experiments.
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