The weather has gotten warm and the pool is now up to 80 degrees. We keep the pool open all year even though we don't use it in the cool months. We've had a good bit of rain and now the chemistry, which stayed perfect all winter, has gotten out of whack. The pool is in direct sun from about 9AM until sundown. Here are the current readings.
FC 1 (Added chlorine after this test)
pH 8.2 (high) up from a constant winter reading of 7.8
TA 110 (high) up from a constant winter reading of 80
CH 140 dropped due to rainfall
CYA 40 down from 50 last month
The pool seems to be using a good bit of chlorine so I'm assuming that's because the CYA is low since it is in direct sunlight. I also need to bring down the pH and TA. What sequence should I follow to correct these numbers?
Can trichlor pucks be used to bring up the cya.