One way I like to raise the Ph while also adding benefits to the plant is by adding Agsil16h.
It’s an 100% organic Potassium Silicate. It can be used as a ph + adjuster because it’s extremely alkaline. But the main benefit of it is that it will strengthen your stalks, and improve disease & heat resistance. It also helps with any damage that occurs. I accidentally split a stem right in half, I taped it and within 2 days it had already repaired itself.
Since I found this product I use it all of the time to adjust ph.
Another product you may want to add is some type of Mycorrhiza like Great White, Recharge, etc. The bacteria and fungi found in these products helps with balancing ph. When using these microbes the ph will fluctuate between 5.5-6.5 which is what you want because the plant will absorb different nutrients during those fluctuations.