Maintaining ph over vacation

It can. Depends on your pH rise, TA of your fill water, etc.
I see you have an autocover. If left closed, your pH will not rise. Or if it does, very slowly.
 
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Your Poolmath logs show a TA of 50. If so, the pH cannot rise much.

Float a couple pucks in a floater if you can with the autocover. That will provide some acid over time.
 
Update: I used pucks while I was away for 3 weeks. The PH just raised by 0.2. I had it lowered to 7.2 before i left to give a better buffer if it raises. I had put in 2 pucks ( from costco) and it was completely used up by the time I got back.
 
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