I wouldn't want to be different, so I'll chime in and say AP test kits are pretty much all I use also. And like others, I have a few Salifert kits for those times when I question my AP tests. I've never found them off by too much though. AP tests I have are Ammonia, Nitrites, Nitrates, pH, Alk
, and Ca
. I have Salifert tests for Ca
, Phoshpates, and Mg
. I also have a Hagen test kit for Phosphates, which in my opinion is kind of useless unless you have very high amounts in your tank as the sensitivity is too low. (It was the first phosphate kit I bought.)
Also agree with tecwizard... don't think you're going to find any Ca
tests that don't use titration (drop by drop). Personally, I immediately add 15 drops and shake - that's 300ppm. I then go drop by drop, counting "20, 40, 60, etc..." until I get the color change. No math required!
Good move doing your own testing. With the amount of time and money I have invested in my tank, I can't imagine leaving something as important as water testing up to anyone else but me.