Bright Red on ph test

[jwp0077]

had a lot of rain here lately, 10 inches this week. Having problems getting a good ph reading. When I add 2 drops regent the tube turns bright red. So I used a 10 ml tube, turns red at 4 drops.
Chlorine is at 6
CYA 50
Aly. 110

can the ph really be that high? or it really low and not reading correctly?

 

[JasonLion]

You normally only have a problem with the PH test when FC is above 10. Since your chlorine is only 6 the test should be acurate.

Rain aerates the pool, which can sometimes cause the PH to rise.

 

[chem geek]

Are you sure you are doing the pH test instead of the Total Alkalinity (TA) test? You don't count drops and have something turn red after so many drops with the pH test. The pH test is normally adding 5 drops of an indicator and comparing the color. The TA test is the one where you first add a couple drops of thiosulfate, then 5 drops of indicator, and then count the drops of titrant to have the sample go from turning green to red and this is usually done with the 25 ml sample size. I'm confused by your test.

 

[jwp0077]

I am performing the color indicator test (5 drops) - just that the color goes off the scale with 5 drops into the color comparator tube. alkaylinity and chlorine test normal.

 

[duraleigh]

Turns bright red or purple? Sounds like your pH is very high or your testing chemistry is a little old. Easy to buy another pH test kit ($6.00) and check your results.

 

[jwp0077]

Looks like the indicator was correct. I added 64 oz. of acid - the ph dropped down to 7.3.
all looks good now.