Two weeks ago we performed Lab 3.1 (Carbon Cycling Between Goldfish and Elodea) using Spirogyra and zebra fish. Even though the procedure went smoothly, I did not realize that the manual had failed to provide formulas for properly answering questions 5 and 7. Below are the formulas with explanations:

5) If you divide the numbers in column I (fish) by column I (plants), you will have the reciprocal of the ratio of fish to plants needed to provide a 1:1 ratio...
Continue reading ...