Diary/Log Book?

[CarlD]

I used to use my PDA with Pocket Excel to log it. Now I just use the cover of the test kit and erase it after the season.

[AnnaK]

I use a ruled school notebook and a . . . gasp! . . . pen. I have five seasons in the book. It's kept in my pool lab, an old, converted camper topper, and it has proven to be invaluable.