And WHAT a storm it was!!
After months and months of drought we finally got a real rain at my house last night. 2 1/2" was in the rain gauge this morning. Problem is, my deck drains are too slow and lots of storm runoff went into the pool. The CL was overwhelmed and the water turned a dark olive green faster than I would've imagined. Since this morning we've put in 12 1/2 196oz bottles of bleach, backwashed and reloaded the filter, and have just gotten to a pale green. I tested the water tonight and got
CL-31
pH-8+
ALK-100
CYA-(50-55)
As soon as I drew the water sample, I added 2 more 196oz bottles.
QUESTION: Should I worry about bringing the pH down now or wait until the water clears more?
Hal
Re: And WHAT a storm it was!!
If your FC is 31 ppm then you can't accurately test pH. It will test high due to a chemical interference between the chlorine and the pH indicator. Your true pH is NO WHERE near that high and is probably in normal range. Wait until your FC levels drop to normal after killing the algae before even thinking about TESTING the pH again.
(Technical reason: High chlorine levels will convert phenol red to clorophenol red which tests a much lower pH range than phenol red so the purple color you are getting only means that your pH is somewhere above 6.8, which is the upper limit for chlorophenol red.)
