I’m doing a hydro run, when I’m coco I would notice my ph rise faster than intended I would normally have to ph down every second dayYeah your blessed with a very good water supply.
I can't see the hardness but if anything g you may need to add a touch if your in hydro or coco and finding your PH is raising a bit to fast.
Ideally a 0.2 increase per day is a good place to be stability wise.
Starting ph 5.8 nd that rises to 6.2/6,4 by day 2 I let it slip tho as it’s good for cal mag uptake
Plants are always a good green