You can always get electric meters that automatically test for you. You just stick one end in the water and it tells you the levels. Only.. they are pretty expensive. But if you've got that kind of money to be throwing around on test meters.. then i'd say go for it.
I would get a link for you.. but for some reason google isn't working for me. If someone provides a link before i come back and edit this message, well then kudos. lol.
Ahh.. here we go. Feast your eyes.