I don't post much, but have been following the TFP method with great success for three years. Something happened today that I can't figure out.
If you look at my logs, I have been adding CYA a few lbs at a time with the sock method since I open this year, working my way up to 70ppm. Two week ago I tested at CYA 60, so I added 40 oz of Stabilizer as recommended by pool math and a week later I test and was at 70. Good enough. Today, I thought I would test again as it is getting hotter and longer days to be sure my CYA was high enough, and when I mix and pour to the 100ppm mark, I can't see the dot. I thought I must have done something wrong, so I remixed a new sample and tried again. Can't see dot at 100. I tried a third time and still can't see the dot. I make a fourth batch and mix, pour half out and add pool water to do a diluted test. Fill to 100 and still can't see the dot. I pour half of that out and fill back with pool water so I am double diluted and no luck at 100. WTH!
It is bright sunshine outside, same as I always do the test. (I have probably done the test 50 times over the last three years.) I got the sample from the same place in the pool as I always do. I did a test with tap water and and R-0013 reagent and It was clear to the 30 mark as you would expect.
I'm guessing the reagent is bad. I bought it from TFtestkit.net a couple of years ago, but it sure seem strange it would go completely bad in two weeks and work fine before that. I store my test kit in my air conditioned house, so it doesn't see temp extremes. I literally have not put a drop of anything in the pool since I put the CYA in two weeks ago. I have a new R-0013 on order from TFtestkit.net.
Anyone have any ideas? I'm baffled.
Ron
If you look at my logs, I have been adding CYA a few lbs at a time with the sock method since I open this year, working my way up to 70ppm. Two week ago I tested at CYA 60, so I added 40 oz of Stabilizer as recommended by pool math and a week later I test and was at 70. Good enough. Today, I thought I would test again as it is getting hotter and longer days to be sure my CYA was high enough, and when I mix and pour to the 100ppm mark, I can't see the dot. I thought I must have done something wrong, so I remixed a new sample and tried again. Can't see dot at 100. I tried a third time and still can't see the dot. I make a fourth batch and mix, pour half out and add pool water to do a diluted test. Fill to 100 and still can't see the dot. I pour half of that out and fill back with pool water so I am double diluted and no luck at 100. WTH!
It is bright sunshine outside, same as I always do the test. (I have probably done the test 50 times over the last three years.) I got the sample from the same place in the pool as I always do. I did a test with tap water and and R-0013 reagent and It was clear to the 30 mark as you would expect.
I'm guessing the reagent is bad. I bought it from TFtestkit.net a couple of years ago, but it sure seem strange it would go completely bad in two weeks and work fine before that. I store my test kit in my air conditioned house, so it doesn't see temp extremes. I literally have not put a drop of anything in the pool since I put the CYA in two weeks ago. I have a new R-0013 on order from TFtestkit.net.
Anyone have any ideas? I'm baffled.
Ron
