Test kits

I use Red Sea for cal/phosphate/nitrate/mag.
I use Hanna for alk.
Sometimes I use API for alk to get a rough estimate of where my alk is in between Hanna use.
I tried using Red Sea for alk, but I have a hard time looking/judging where the color turns orange.
 
Hanna Checker for ALK and Phos.
Lamotte Nitrate kit is serve me well
Calcium both Saltifert and Red Sea.
 
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