I recently switched from a few month old Red Sea calcium test kit to one that expires over a year from now. My measured calcium changed from 420 to something over 600! Not believing the number I tested newly mixed saltwater that's supposed to be in the 420-440 range and that tested over 500.
What could be going on here? Could there really be that much difference between test kits and is it possible my new test kit is out of whack? I've been doing these tests for 3 years and doing it consistently with what I've done in the past.
What could be going on here? Could there really be that much difference between test kits and is it possible my new test kit is out of whack? I've been doing these tests for 3 years and doing it consistently with what I've done in the past.