RockStacker
Reefing newb
When you use the titration kits for Ca, and Mg, do you record the readings as soon as the color changes?
Or do you wait a few seconds to see if that color holds?
This is what I have been experiencing lately with my test kit.
For example, the Ca test:
1.When I start adding the titrant, the color changes from pink to blue at a certain point (for example, 400ppm equivalent).
2. I put the kit down to record my readings and when I look at the vial for the Ca test a few seconds later, the water is pink again. I add one or two drops of the titrant again and this time when it turns blue, it stays blue that for a few minutes.
So I want to check, which reading is the correct reading? The moment that the test sample initially changes color (despite reverting colors a few seconds later)? or when it gets to a point where it stays blue?
Sometimes it takes up to 4 additional drops after the initial test to change the color to blue and get it to stay that way, which is a significant value swing compared to the initial readings.
I have not observed this on the Alk test, and just to a minor degree for the Mg test.
Or do you wait a few seconds to see if that color holds?
This is what I have been experiencing lately with my test kit.
For example, the Ca test:
1.When I start adding the titrant, the color changes from pink to blue at a certain point (for example, 400ppm equivalent).
2. I put the kit down to record my readings and when I look at the vial for the Ca test a few seconds later, the water is pink again. I add one or two drops of the titrant again and this time when it turns blue, it stays blue that for a few minutes.
So I want to check, which reading is the correct reading? The moment that the test sample initially changes color (despite reverting colors a few seconds later)? or when it gets to a point where it stays blue?
Sometimes it takes up to 4 additional drops after the initial test to change the color to blue and get it to stay that way, which is a significant value swing compared to the initial readings.
I have not observed this on the Alk test, and just to a minor degree for the Mg test.