I finally got enough rain to do a ph and alkalinity test on it. I know... we say it rains all the time here but the volume is actually low and most days we get about one or two tenths of an inch, even if it rains all day. Yesterday it was closer to a whole inch. Woot! Got me a whole bowl full of the stuff.
PH for our rain is off the charts low. Bright freakin yellow. Like OTO chlorine bright yellow.
Alkalinity is also low. One drop turned it red.
PH in the pool before this rain yesterday was 7.7. After, a very clear 7.5.
Fill water ph is 8.0, alkalinity is 40.
Now I know why my ph kept dropping while all you's out there complain that it rises over time. The rain hadn't let up yet.
Dangit! 8yo just had to get out of the pool because it's started raining again.