Anyone have wonky Salifert Ca test kit?

[Aquattro]

Originally Posted by Lance

Brad, I've come to the conclusion that some of these kits are not that accurate. I took Ca readings with 3 different kits: Salifert 380, Tropic Marin 420, and API 440. Which one is right, if any?

Well, with three like that, you would average it for the real value!

Man, if you can't trust test kits!!!! My water has some amount of salt, at some temperature that may be wrong, it may or may not have Ca, Alk is a throw of the dice, and everything else is make believe. Only thing I know for sure is it's wet!

I always said, this hobby is more art than science!