Using Taylor CYA Test

[thelma]

I have some questions about conducting a Taylor CYA test (with the disappearing black dot.)

After waiting more than 30 seconds but no longer than 3 or 4 minutes, when I test inside the house, the dot disappears at between 65 and 70. If I test outside in natural light, the dot disappears between 45-50.

My question is, how and where should test? Which numbers are correct for me?

Thanks for the help,
Thelma

[aylad]

I have some questions about conducting a Taylor CYA test (with the disappearing black dot.)

After waiting more than 30 seconds but no longer than 3 or 4 minutes, when I test inside the house, the dot disappears at between 65 and 70. If I test outside in natural light, the dot disappears between 45-50.

My question is, how and where should test? Which numbers are correct for me?

Thanks for the help,
Thelma

You're supposed to test in natural light--but the bottom line is that you need to test in consistently same light each time, whichever route you take. If you keep your chlorine in the 5-8 range, it really doesn't matter what the actual number is--CYA testing just gives you a ballpark, anyway.
I personally use the flourescent lights in my kitchen.

Janet

[waste]

Janet nailed it! The same applies to all tests, the most important thing is consistancy! The chem levels have enough 'allowance' in them that it doesn't matter if your test is off 10-30 ppm, but you've got to be consistant with your testing to insure that you know when to add or lessen the level.

[thelma]

Thank you both for your replies. I will stick to the natural daylight in my kitchen. I already make sure to test at the same time each day so the light will be the same.

[Poconos]

I use a fluorescent desk lamp aimed at a white paper then look thru the tube at the light reflected off the paper. Seems like this gives results close to viewing in outside daylight.
Al

[waterbear]

I have noticed that the test gives a higher reading under indoor incandescent ligh than it does outside in natural sunlight (actually I stand in open shade outdoors when I do the test) My readings outside are 70 ppm but indoors in incandescent light it's more like 90 ppm! I'm sure this has to do with the intensity of the light source. Once again, it's not the actual number that is as important as whether you test the same way each time so you know if your numbers are actually changing or just different because of the lighting.