Testing Total Alkalinity

[Sahampton]

I have the TF100 test kit and I am wondering if I am doing something wrong. When I test it (twice so far) It was 240 and now it is 200. Now, when I take it to the pool store, they say it is 112. I know the pool store isn't the most accurate, but can it really be almost 100 points different? Any input would be greatly appreciated.

 

[Texas Splash]

I know the pool store isn't the most accurate, but can it really be almost 100 points different?

If you are doing the TA test properly, your numbers certainly could be that much different that theirs. But let's confirm:

25 ML water sample size with two drops of #7, five drops of #8, then count drops of #9 until it turns Barbie pink right? Multiply # of drops by 10?

 

[Sahampton]

If you are doing the TA test properly, your numbers certainly could be that much different that theirs. But let's confirm:

25 ML water sample size with two drops of #7, five drops of #8, then count drops of #9 until it turns Barbie pink right? Multiply # of drops by 10?

That's what I did. Is it supposed to be solid pink or any slight pink swirl?

 

[Texas Splash]

Is it supposed to be solid pink or any slight pink swirl?

It will be a solid bright Barbie pink.

 

[Sahampton]

It will be a solid bright Barbie pink.

Great! that was helpful! My reading is indeed 200 then.