PH Raised after algaecide?

Northern cannonball

Bronze Supporter
Sep 12, 2021
150
Toronto, Canada
Pool Size
9250
Surface
Vinyl
Chlorine
Salt Water Generator
Hi Everyone,
The pool company is coming tomorrow to close the pool and I am in the process of prepping by following the "How To" for closing an inground pool. All was going well, yesterday my FC was half of my SLAM target and I lowered my PH to 7.6 . Today I added algaecide and let the pump run about 8 hours. I just tested my FC and PH and my FC dropped a little as expected, however my PH shot up to 8. No rain in the past 24 hours. Of course I used up all my muriatic acid yesterday... so if I can't get to the store in the morning, is there any issue closing the pool with a PH of 8'ish? Also does algaecide make PH go up? thanks in advance.
 
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