reef dude
Member
Ok first of all im not sure if im doing my calcium test correctly. Its the red sea calcium test that uses the titration method. now heres the trick, when i slowly add the drops of reagent to the vial, should i be gently shaking the vial as i add the drops or do i hold the vial completely still?
The first time i added the reagent i shook the vial as i added, and very quickly the color changed(350 ppm) about 2-3 months later i started adding liquid calcium and then stopped after about 5 days and started dosing kalkwasser. Now i measured calcium and when i dripped the reagent, i shook the vial and it turned to the end color very quickly. I decided to do the test again, this time i kept the vial very still as i added and i could see a distinct line of colors(one was the start color and one was the end color) the end color kept pushing down on the start color and after about 2 ml added of reagent, i finally reached the end color, but the reading was 500+ ppm!!! any ideas????
The first time i added the reagent i shook the vial as i added, and very quickly the color changed(350 ppm) about 2-3 months later i started adding liquid calcium and then stopped after about 5 days and started dosing kalkwasser. Now i measured calcium and when i dripped the reagent, i shook the vial and it turned to the end color very quickly. I decided to do the test again, this time i kept the vial very still as i added and i could see a distinct line of colors(one was the start color and one was the end color) the end color kept pushing down on the start color and after about 2 ml added of reagent, i finally reached the end color, but the reading was 500+ ppm!!! any ideas????