I am converting to TFP. Got my test kit. My water is fine, I completed my SLAM and now looking to just maintain. So I had the store test my water just to very the TF-100 test kit results and the CYA is significantly different.
Here are the results:
The CYA is VERY different. I looked at the pool school notes and it says (in the extended test directions section, last bullet):
If the store system is reading CYA high (+15%) and the TF-100 is reading low (15%) we get adjusted levels at(PPM):
Should I try other stores and get CYA re-tested? Or is my CYA test kit bad? This is a huge delta on the non-adjusted readings and is confusing me as which way to go. (I will ignore the variations in alkalinity for now).
Please share your thoughts on what I should do.
Here are the results:
Store | TF-100 | |
FC | 6.18 | 6.5 |
CC | 0 | 0 |
PH | 7.6 | 7.5 |
CA | 223 | 250 |
TA | 84 | 100 |
Adjusted TA | 69 | |
CYA | 45 | 30 |
Copper | 0 | |
Iron | 0 | |
Maganese | 0 | |
Total Dis Sol | 800 |
The CYA is VERY different. I looked at the pool school notes and it says (in the extended test directions section, last bullet):
- The precision of the test, when done correctly, is around plus or minus 15 for levels up to 90 and plus or minus 30 for levels between 100 and 200. Novices often have problems reading the test correctly, and tend to get higher than actual readings.
If the store system is reading CYA high (+15%) and the TF-100 is reading low (15%) we get adjusted levels at(PPM):
38.25 Store |
34.5 TF-100 |
Please share your thoughts on what I should do.