Quote Originally Posted by Poolsean View Post
There are quick read and slow read strips. The quick read strips give you results within about 30 seconds. These strips give you a short window of opportunity to compare the test pad to the label... maybe 3 seconds? Even shorter in full sunlight. You dip the strip into the pool, hold it horizontally, and compare the test pad after about 25 seconds. After 30 seconds, the test pad will change rapidly so it's useless after that.
Thanks Sean. I was not aware that LaMotte had come out with a salt test strip. As I said before the Hach strips (the slow ones) are actually a titrator. As the liquid rises up the strip the chloride ions react with the silver nitrate and change color. When the chloride is used up there is no further color change as the liquid rises up the strip.