ok .. so your PH is a lot like mine .. so mostlikely the same (use hard water nutriens .. come in them two diffrent types .. hard and soft)
you will also need some PH down as you want to use water that have a PH of 6,5 (after you add the nutriens)
this is realy importent for helthy plants ..
its cheap and even comes in bottels for veg and flower (got the acids its need/can use in veg/flower for extra helth)
I reccon a small bottel is like 10$ or so ..
and some liquid PH test kit .. same price easy to use .. 500 times for a small bottel/kit ..
to find out exatly your water queality/hardness .. check your water company web pages .. search/google it .. location/water most citys have a detaild chart of what it contains ..
also if you have clorin in your water you want to tap it the day or two before useing it to make the cloring evaporate .. even if you dont have .. tap it the day before .. roots like tempert water .. not to cold or hot .. room temps ..