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  1. edif30

    FC Drop - Is this normal?

    Holy Smokes! - I've got some reading to do!
  2. edif30

    FC Drop - Is this normal?

    This is interesting. Is there any documentation or something that explains why chlorine breaks down faster when the concentration is higher? I'm mainly curious of the scientific reasoning.
  3. edif30

    FC Drop - Is this normal?

    Yes, I actually wait longer. Usually an hour. But like I said. From 33 in the morning 8am to 10pm it shot down to 20ppm FC. Its now 10:40am and the FC is 19ppm. Sun is not out though. I have brand new DPD powder with a best date of 5/2021.
  4. edif30

    FC Drop - Is this normal?

    Just an update. I just checked FC and it is at 19. So, from 10pm last night until now which is 10:32am, I lost 1ppm. It's also very cloudy, not any sun, and heavy rain.
  5. edif30

    FC Drop - Is this normal?

    I have been a TFP supporter and following the great advice on this forum. I am back for another scenario. This pool season has been great. Only adding in liquid 12.5% bleach daily. Typically my CYA was 45 and my daily chlorine dump was around 32oz to 64oz depending on how much sun was out...