gabriel.basso
Member
Hi,
I made a Drop Checker solution with Deionized Water and Sodium Bicarbonate. The procedure was to add a small amount of NaHCO3, shake it and test with Sera KH test kit until I got 4 dKH. The curious thing is that after all done I made a second test using Hagen test kit and the outcome was quite different!
Sera (result unit: dKH, 1 per drop) = 4 reagent drops = 4 dKH x 17,9 = 71,6 ppm
Hagen (result unit: ppm, 10 per drop) = 5 reagent drops x 10 = 50 ppm x 0,056 = 2,8 dKH
A deviance of 43% ... isnt it too much? I've tested again and again, all with the same results.
My first thought is that some of the test kits has expired.. guess the best thing to do is to buy another test kit
cheers
I made a Drop Checker solution with Deionized Water and Sodium Bicarbonate. The procedure was to add a small amount of NaHCO3, shake it and test with Sera KH test kit until I got 4 dKH. The curious thing is that after all done I made a second test using Hagen test kit and the outcome was quite different!
Sera (result unit: dKH, 1 per drop) = 4 reagent drops = 4 dKH x 17,9 = 71,6 ppm
Hagen (result unit: ppm, 10 per drop) = 5 reagent drops x 10 = 50 ppm x 0,056 = 2,8 dKH
A deviance of 43% ... isnt it too much? I've tested again and again, all with the same results.
My first thought is that some of the test kits has expired.. guess the best thing to do is to buy another test kit
cheers