Salifert Alk test kits

[TANGOMAN]

I've used many Salifert test kits in the past. I find them to be reliable and consistant. I haven't yet used their alkalinity test kit. Some of the Salifert kits have color charts that are almost impossible to distinguish color differences. I've been blessed with color blindness. (That was in exchange for a bald skull I guess... ).
How is the color chart with the alk. kit ? If it's hard to differentiate, it's not accurate for me.

[Delphinus]

No colour chart with the alk or Ca kits. Instead it's a titration where the colour changes from blue to pink, you then take a note of how much titrate you dispensed and look up the number on a table. Much better than guessing if a colour shade of green is more yellow than pink...

[JohnM99]

Sorry to disagree - this one is IMPOSSIBLE for red-green colour blind people (such as myself!!) - I have to get help to do this one - no way I can tell when it changes.

Colorimeter would be nice!

[Aquattro]

Originally Posted by JohnM99

for red-green colour blind people (such as myself!!) -

I sure hope you don't drive!!

[JohnM99]

Driving is no problem - the lights are easy to tell apart. But not pink-blue titrations.