API tests compared to Red Sea Tests

[srt8]

So I have the API water test kits.I bought some Red Sea Salifert type for KH,Ca,and Mg. a few days ago. I think when I get time I will run the tests with both kits and see how the cheaper API compares to Red Sea. Any guesses on how close they will be to each other?

 

[srt8]

The Red Sea is pro titration kit. But still going to compare. Also if my calculations are correct it appears I drop 20mg/l Mag, 10mg/l ca.,and 1mg/l Kh a day. Although my mag levels and ca were elevated to begin with. Does this sound in line? I'm trying to determine dosing