K-1000 FC limitations

[TheDeuce]

Hey crew. Have a question on using the K-1000 for day to day FC measurement. Since my CYA is up there around 60 my recommended FC levels are between 5 and 9. The K-1000 maxes out at 5 ppm for FC. I suppose I can use it to make sure that I'm hitting that 5 ppm minimum but can I use fewer drops and the bromine numbers on the vial to get an idea of where I'm at when my FC is over 5 ppm?

Also, the K-1000 is giving me a pH reading of 7.8 while my PH-009(I)A pH meter says 8.1-8.2. FC is at 9.5, cc <0.5. Which do I trust? I expect that 7.8-8.2 is outside the margin of error.

It's been a cold weekend and my pool is being sadly underused. I may as well use today to add the last of my dry acid...


Happy Fathers Day to all the dads out there!



m.

 

[Texas Splash]

It would be best to have the FAS-DPD for accurate FC tests above 5 ppm. Meters are a bit tricky just because of calibration requirements. Drops testing is generally reliable and as long as you are in the upper 7s you should be fine.

 

[TheDeuce]

I’m asking about the pH reading because my oldest kid is complaining about irritated eyes which he didn’t do at pH 7.3 pre-slam. I’ll go with the K1000 reading. Even though I calibrated the meter when I bought it I’m not confident in it and I have no more calibration powder.

m.