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Red Sea Pro..Love them
Should have made it a multiple choice, or least been able to choose more than one
API for some
Salifert for some
Tree,
have you tried the hanna checker? no need to color match, just add the reagent,shake and press button..wait 3 mins and results are digitally displayed (and accurate).
I used Hannah Checkers but had someone talk me into Salifert, saying they were more accurate. It appears my Hannah Ca was reading way high. The Salifert are quite easy to use.
One just has to be cautious with any test - they all can have issues, due to misuse or malfunction.

