time for new test kits

[George]

Originally Posted by danny zubot

Elos are good because they are easier than Salifert, but Salifert are still the most accurate for CA, MG and KH.

Please back up your statements.
For Mg test anyway, Elos Mg test is a PITA to do because you have to do almost the same thing twice and then do some math.
Please point me to a reference where it states Salifert is the most accurate for Ca, Mg and KH.