FC tests fine in the morning but it's gone by afternoon

Started by swamp_tyler · · 2 replies
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#1
been chasing this for like two weeks now. i test with my K-2006 around 8am and im sitting at 4ppm FC, feels good. go back out after work around 5 and its basically zero, like 0.5 if im lucky. phoenix sun is brutal rn but this seems like more than just normal burn off. havent tested CYA in a while, could be too low and just torching the chlorine all day. anyone else see swings this dramatic or is something else going on, pump runs about 8 hours midday through late afternoon if that matters. not trying to just keep dumping more liquid chlorine in without knowing why its disappearing that fast

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#2
Low CYA is almost certainly it, not just "normal burn off," 4ppm gone to nothing in 9 hours of Phoenix sun with no stabilizer is textbook. Test the CYA before you add another drop of chlorine, if it's under 30 that's your whole problem.
#3
yeah karen's probably right, i gotta actually test it instead of just guessing like ive been doing. that capful every few months thing i do is basically a shot in the dark, could easily be sitting under 30 and i'd have no idea.

gonna run the CYA test on the K-2006 tonight and see where im at. if its low that explains everything, 4ppm with zero protection in this heat is gonna cook off fast no matter how much i keep adding, i been treating the symptom instead of the actual problem this whole time lol