Which Is The Best/Most Accurate Water Test Kits?

[TaknByD]

Still don't understand why people complain about api's kits. Sure, they're only good for getting you a range, but they are pretty accurate. I know the NO3 kit shows similar values above 10ppm compared to my salifert kit. But, of course anything below that and those 5ppm and 10ppm beige colors are pretty similar.

Well my API kits are all over the place. The PH is just hard to read... Actually most of them are pretty difficult to read unless they are zeroed out. But my API kit for Calcium, forget it... It's showing that my average is above 600 sometimes more than 700... I'm sorry but something is wrong there. I do a lot of tests,and I even test my water before taking it to the LFS to get checked and there is always a huge difference.