High Chlorine readings - how do they impact other readings

[chem geek]

Mmmmm. Let's see. 25% * 500 + 75% * 160 = 245 which is pretty close to your measured 260. I'd say your measurement is the correct one.

High chlorine levels should not affect the CH test. Chlorine levels above 10 ppm affect the pH test, usually making it read too high. High chlorine levels can also make the TA test go from blue to yellow instead of the normal green to red.

Richard

[waterbear]

Pool magnets are nothing but snake oil! They have been around for years and all they do is lighten you wallet! If you decide to buy one please contact me about a bridge in Brooklyn I would like to sell you!

The only other test that high chlorine levels could affect is the chlorine test IF you are using DPD (not FAS-DPD titrations or OTO) since DPD starts to beach out at about 10 ppm and will read low or no chlorine slightly above this level.

[CarlD]

Hey! That's MY bridge! I got a receipt!

I would raise FC a little--with CYA=65, you are at the very low end of "safe" with FC=5 The recommended range for CYA=60 to 90 is FC of 5 to 10 ppm.

[waterbear]

Hey! That's MY bridge! I got a receipt!

Sorry Carl, I forgot I sold it to you last year! There is still that real estate in the Everglades available.

[CarlD]

Sorry Carl, I forgot I sold it to you last year! There is still that real estate in the Everglades available.

I gotta get in on that! I think I'll see if I can still get a no-principle ARM to pay for it.

"Hey! This is MY swamp!" --Shrek

[Charlie]

Thanks for the responses. I'll stay clear of the magnetic water conditioner.

I would raise FC a little--with CYA=65, you are at the very low end of "safe" with FC=5 The recommended range for CYA=60 to 90 is FC of 5 to 10 ppm.

If I raise the CYA to 80 or so, then the FC can be lower? I'm concerned about getting accurate readings (sorry just part of my job in metrology - being precise in measurements). I guess I'll add some stabilizer to raise it a bit.

[chem geek]

If I raise the CYA to 80 or so, then the FC can be lower? I'm concerned about getting accurate readings (sorry just part of my job in metrology - being precise in measurements). I guess I'll add some stabilizer to raise it a bit.

You've got it backwards. Carl was suggesting raising the FC, not the CYA. If you raised the CYA you'd have to raise the FC even more. I'd leave your CYA where it is and just try and target a 6 ppm FC instead of the 5 where you are now at. This will help ensure that you don't get any algae growth.

You'd only raise your CYA if you found that your chlorine loss from sunlight during the day was too high.

Richard