Anyone know of a good electronic method to test for water parameters. I know there is a salinity tester that you can simply dip in and get an accurate reading, but what about other parameters? I am finding different LFS's test for different things and consider different parameters to be "normal" or "optimum". I have little kids and puppy so having too many chemicals around isn't a good idea and time to do a bunch of different chemical based tests isn't conducive to testing as frequently as I'd like. Ideas?