Quote Originally Posted by KurtV
Carl,
From how deep in your pool did you sample? It seems unlikely that the (nearly) undiluted rainwater could could extend as far down as 18" or even 12".
About as far down as my elbow...the water is still brutally cold so I'm not going deeper!

I agree that the layering could EASILY be that deep--or more. But now the pump's been on 24/7 since Sunday mid-day.