Ravi,
Don't know if you use the Red Sea supplements, as well, but I received an email message from Red Sea indicating how you can make a Reference test from their supplements.
Here it is...
We can recommend the following solution is made to check the performance of the kit, however this is not a reference solution but is accurate enough to confirm if the test is performing correctly.
Element Source Volume DI volume
(not R.O. as it is only 93% pure) Standard level
Standard Range
Ca Foundation A 4 ml 996 ml 400 ppm ?10 ppm
Alk Foundation B 1 ml 999 ml 10 dkh / 3.6 meq/L ?0.5 dkh / ? 0.18 meq/L
Mg Foundation C 10 ml 990 ml 1000 ppm ?20 ppm
Please be advised that our liquid foundation supplements only can be used for this solution.
Unfortunately, I don't use their supplements, but maybe you do.
David