eeeeeeeeeeeek....looks like chemistry class.
what is funny about actually seeing all of those abbreviations, and knowing what they mean, makes me realize that in maintaining my fish tanks, and worrying about such things that are listed up there NO2, NO3, Fe, I, NaCl, CaCo, all that stuff reminds me of chemistry class....
which i had to take twice in high school, becuase it bored me so much i didn't pass the first time! Now, i am actually concerned about how my NO2 converts to NO3...
or is it the other way around....?