Mort,

You need to do that test under daylight conditions. Either the fluid is white,
or it is slightly blue. You'll have to judge that for yourself. Your goal is
white.

Regarding the Ca test, you add a drop at a time, until the color changes
(shaking after each drop). If the color starts to turn from dark blue to
purple-pinkish after 20 seconds, add one more drop, and then take that reading
off the syringe.

Marc


Mort wrote:

Hi all,
I am having trouble deciphering the reading this test kit is showing me.
Maybe I am getting old but if you look at the card, it can be hard to tell
the difference between two shades like .25 and .5

I mean, yeah, I CAN see a difference but it is SO minute.

Anyway, are there any tips for getting a match between your test vial and
the card? Like, if you put the vial on top of the card but have it on BOTH
the white and the blue, can you get an idea of where you are?
For example, if I compare the color of my liquid to say .03, I can clearly
see the blue for .03 is darker than my vial when looking through the liquid
from above. But if I have the vial over the WHITE only, it appears to be
about .25

Another question, Take Saliferts calcium tesk kit for example. I think
that is called a "tritation" method? Where you slowly add a third component
until the media turns to a different color and THAT is your reading
result...

Does anyone know of a test kit like that for Phosphates?

TIA

~Mort

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