Overnight FC Test -In the Rain?

[moneytastesbad]

Was going to do an Overnight FC test tonight, however, we just got one heck of a storm. Logic tells me that the additional water from the rain will cause the FC level to drop, which makes the test invalid. Am I correct?

 

[JasonLion]

Yes, rain often uses up extra chlorine, so you can't count on the test results.

 

[moneytastesbad]

Thanks Jason, that means I get to sleep a little later in the morning!