I'm not sure how difficult it would be, but you could allow users to select which chemicals to graph. See 2016 Italian Grand Prix lap charts F1 Fanatic for an example of a graph allowing the user to select and de-select data ranges for a chart.
It would be cool to have a chart that takes the various parameters like today's weather, CYA level, etc into account and predicts the amount of FC loss expected over the hours following a test. I don't know the calculations but someone on here should.
Just testing something. I added a function on the main page. If you click your FC number it will tell you some info and if you are in range for your CYA. The number will change colors if you are out of range. If anyone enters something like 45 for CYA it will always round up to the nearest 10 for good measure. Still thinking about the best ways to implement this for each test.