Wich one you think its more accurate?

[renato120]

Which one of you think its more accurate for Calcium test kit?
*Elos
*Salifert
*Red sea
I have all 3 and they never read the same. Not sure what to trust. What Do you use?
Thank you.

 

[Greenstreet.1]

Salifert all day for I but I also like elos but my LFS hardly has it.

 

[Breadman03]

My Salifert and Red Sea have both matched for me, but I have to go slowly with the Red Sea or it changes color prematurely. It's like the concentrated area of reagent turns color and triggers the rest to change color when swirled.

I wouldn't worry too much about your exact number, but just keep that number stable.