The weirdest thing is happening and I'm hoping someone can help. On the sides of my pool, something green-ish is showing up on the walls that comes off once we brush. I immediately assume algae so I get out my test kit and ... nothing. I get no CC when doing the drop test. I have done it multiple times!
Anyone have any idea what is going on? This is a new TF-100 test kit (bought ~April 2016) so the contents should all be fresh.
Some specifics below:
15,000 gallon salt water pool, but the salt water piece has not been creating chlorine because it is reading the salt level as too high. My salt is around 3800ppm. Trying to find a good time to dump some water, but we're in CA and the water companies do not love that. I have been using bleach to get chlorine into the pool
CYA: 40-ish (too low, I know )
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