SWCG Maintenance Question

[chem geek]

All else equal, lower temperature will have the pH of the water rise which naturally helps to keep the saturation index stable. So if you find that the pH has risen from 7.5 to 7.7 as the temperature dropped, don't worry about it. Also, since pH is temperature dependent, you do NOT want to warm the water to room temperature before measuring pH.

The other water chemistry tests will still work at lower temperatures, though may take a little longer for reactions after mixing. The CYA test may not be as accurate, however, so that's one to get to room temperature before doing the test.

FC, CC, TA, CH should all report correctly at colder temps and should give you the same result even if you warmed the water to room temp first.

[Flysurfn]

thanks
good info