I would try it as is. PH perfect is supposed to be chelated to allow for a wider range of PH availability for the minerals.
I use it in hydro systems and coco and never adjust PH...I had a res that got to 7.2 before i swapped it out after 2 to 3 weeks. the plants were just starting to show problems.
For water systems i think the stuff is aces. I TDS to 100 with Calmag and then to 800 or so with trio. I use it in bloom so its bloom driven (I use Megacrop in veg)
I really liked the coco ph perfect but it has some proprietary thing in it that the Canadian gov says 'No we will not import that'..to
So i switched to trio and i like it. A lot.