Getting ready to close the pool, vacumed, then added algaecide (60% polyquat), about 3 hrs later tested the water, and the PH which had been 7.6 the day before, was off the charts. When added the drops for acid demand, it just got pinker and pinker...never seen it do that. In researching the affects of algaecide, it doesn't appear it should affect the PH this way. Thoughts ?
Also, is there a page on the pool forum that lists step by step instructions for closing your pool ? I seem to read so many different ways. I am doing this, vacuuming, adding algaecide, wait a few hrs, then shock the pool, then will drain, blow out lines, add antifreeze, cap the the returns, fill with water so over the jets, put the pool cover on.

Thanks.