So, for testing, I have Trident and use Salifert and Hanna for backup testing once a week. For Alk, Hanna is always highest, Salifert middle and Trident lowest. For Ca and Mag, Trident and Salifert with Trident being slightly lower than Salifert.
My question is the technique of using the Salifert tests. It says to add drops, one at a time, until the color changes. There seems to be a window of a few drops in each test where you get a slight color change to when you get a full color change. I tend to keep adding drops till I get a full/positive color change. I think that may be why my Salifert test are always higher versus my Trident test (I also think I might be fudging it with an extra drop to get the result where I want it).
For those that use Salifert, what is your technique? Do you stop as soon as you see a slight color change, or do you keep going to get a full color change? Example would be for Alk, stop when you see a pinkish blue, a blueish pink or when you see a full pink color with no blue tint to it. Those three options can make a difference of about 0.6 for Alk.
Jetson
My question is the technique of using the Salifert tests. It says to add drops, one at a time, until the color changes. There seems to be a window of a few drops in each test where you get a slight color change to when you get a full color change. I tend to keep adding drops till I get a full/positive color change. I think that may be why my Salifert test are always higher versus my Trident test (I also think I might be fudging it with an extra drop to get the result where I want it).
For those that use Salifert, what is your technique? Do you stop as soon as you see a slight color change, or do you keep going to get a full color change? Example would be for Alk, stop when you see a pinkish blue, a blueish pink or when you see a full pink color with no blue tint to it. Those three options can make a difference of about 0.6 for Alk.
Jetson