Quote Originally Posted by Apollo
Now let me ask you this, I just took my FT water and add 2 drop instead of 10 drops to test the water. That's 20% testing solution into the FT water, than multiplied the reading by 5 to bring it back up to the 100% range. It seems to me that the read out is the same...
That might work. You can do it both ways and see if you get the same results.

My guess is that for the color to be right you would need to use the full count on the drops.

Let us know your results.

Oliver