Hello summer, hello algae, hello pool forum!

[True Blue]

Did you test FC and CC with your k-2006? What were the results?
How are you collecting the water sample? I try to take the water from about elbow depth - hold the sample tube upside down until my arm is in up to the elbow.
The pump is on and mixing the pool , yes? Did you collect the sample near where you dosed the bleach?

I do the collecting method that you speak of, upside down, well beneath the surface. The pump is/has been running. I did collect both samples near where I dose with the bleach, but the first sample this morning was at least 14 hours since I last added anything.

I did not do a FC and CC test with the Taylor kit. I'll do that in a bit, as the rain is supposed to be ending soon.

[True Blue]

Testing with the Taylor kit, "upstream" from where I add the bleach:

FC: 4
CC: 2.5
pH: >8.0

My pump is currently off, as a large amount of rain will sometimes trip the breaker.

Any thoughts on what would cause a spike in pH? It certainly wasn't that high yesterday. Again, I know that bleach is basic, as is the ammonia that the algae would be producing.

[Watermom]

Did you have torrential rain which caused a lot of rippling on the surface? Aeration raises pH. Just a thought. I wouldn't expect that kind of increase though. My rain is usually acidic and lowers my pH. Go ahead and drop the pH some.

[True Blue]

Did you have torrential rain which caused a lot of rippling on the surface? Aeration raises pH. Just a thought. I wouldn't expect that kind of increase though. My rain is usually acidic and lowers my pH. Go ahead and drop the pH some.

No, the rain was steady, but lengthy...probably 12 hours straight. I'll be adding my first dose of dichloro tomorrow. That should bring the pH down some, shouldn't it?

[Watermom]

Yes, but not immediately. You typically don't see the pH fall until the dichlor is used up so give it a little time.

[True Blue]

I am...befuddled, to put it mildly. My pH has dropped from 8.2 on Sunday to 7.2 today, with only the addition of bleach. If you'll recall, when I opened the pool on Satuday, the pH was 7.5. My FC had dropped to 7.5, so I added my first dose of dichlor this evening. CC was 2.5. The good news is that I seem to have gotten rid of most organic matter off the bottom. My water is cloudy blue.

Any thoughts on the pH yo-yo?

[True Blue]

I'll add that the alkalinity is at 70 ppm...and that I ordered a pressure gauge that should arrive by Thursday.