Quote:
Originally Posted by Steve175
I own the Hanna checkers. They are gathering dust. I am a chemical engineer. I have, over the years, tried most brands (although admittedly not Nyos). I mostly check Alk and have always ended back at Salifert. The others are monthly: Ca (Salifert), Mg (Salifert), PO4 (Red Sea) and NO3 (Red Sea). I will sell you my Hanna checkers for cheap. . . make sure you pick up some DI water and be careful with the tiny powder packets. . . and, for goodness sakes, don't sneeze or put fingerprints on the vials. . . and whatever you do, don't run the test twice or you won't know which result to act upon. . . my $0.02. . .
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What kind of checkers do you have Steve? Can you PM me with a list and price? I might be interested in some for a good deal 😁