No.
7.0 is a low pH, but won't hurt your liner and the chlroine will be more effective with the lower pH.
Now, what you need to do is just hammer that pool with bleach--keeping it between 12 and 15ppm. Check your water 3x/day for bleach levels and add when below 12. Just watch the pH but don't do anything unless it fall below 7. The you should add 1/2 box of Borax.
The other numbers are OK--fine-tuning isn't necessary to solve your problem. Lots and lots of bleach....
Plus do the usuals: run your filter 24/7, brush daily, vacuum to waste daily.
I KNOW you don't feel like it, but you ARE actually making good progress.
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