CYA test

[nyg2k]

I opened my salt water pool and all is good. I purchased the TFT complete test kit last year. I cannot get the hang of the CYA test (or my chlorine is out of balance). I mix the pool water with the 0013 solution but when I pour into the clear tube (hold at waist level and fill until the black dot disappears at the bottom). I did store everything inside over the winter).

 

[kellyfair]

I think we’re missing something... does the black dot ever disappear?

Can you post all of your numbers?

 

[Texas Splash]

I mix the pool water with the 0013 solution but when I pour into the clear tube (hold at waist level and fill until the black dot disappears at the bottom).

I think part of your sentence may have cut off. In any case, try this:

CYA Testing:
Proper lighting is critical for the CYA test, so you want to test for CYA outside on a bright sunny day. Taylor recommends standing outside with your back to the sun and the view tube in the shade of your body. Use the mixing bottle to combine/gently mix the required amounts of pool water and R-0013 reagent, let sit for 30 seconds, then gently mix again. Then, while holding the skinny tube with the black dot at waist level, begin squirting the mixed solution into the skinny tube. Watch the black dot until it completely disappears. If it helps, pour a little, look away, then look back and pour some more. Once it disappears, record the CYA reading. After the first test, you can pour the mixed solution from the skinny view tube back to the mixing bottle, shake, and do the same test a second, third, or fourth time to instill consistency in your technique, become more comfortable with the testing, and validate the CYA reading. If you are still questioning your own results, have a friend or two do the same test 2-3 times. Share your results only after everyone is done to see if you came up with the same average results.

 

[nyg2k]

I think we’re missing something... does the black dot ever disappear?

Can you post all of your numbers?

Salt water pool

FC-4 PPM
CC-0 PPM
TC-4 PPM
Calcium Hardness-250 PPM

 

[kellyfair]

Ph? TA?

Are you using this method for CYA, and if so what is the result?

Follow this method: In sunlight, back to the sun, fill tube to first line. Quick glance, don’t stare! Still see dot? Fill to next line, quick glance. Still see dot? Repeat. The first line where you don’t see dot with a QUICK glance is your CYA. Maintain proper FC level accordingly.