If you, or anyone wonders. Even just a little. Ever.But now he's got "water looks good" and water chemistry is on spec
Do not pass go. Do not collect $200. Procede straight to Overnight Chlorine Loss Test.
Then either keep the upper hand in the battle, or sleep like a baby because you *know* there's nothing brewing.
None of us are psychic or have wizardry skills. We rely on accurate testing to tell us the story. The pool will *always* tell you what it needs, if you're smart enough to listen. It will not listen to you.