Ok....so now we can go forward......Don't buy distilled water yet......Do your test again but this time adjust your tap water to 6 before you put it in.....and see what it says at the end of a few hours. If it stays pretty stable then you can use that water.....and it will save you having to buy CalMag and distilled water for your system. The biggestt problem with tap water imo is keeping the ph stable....so test yours and find out. That's the only way you will know.

I personally have not found a way to combat the high ph with hydroton.....and therefore I don't use it. It may be fine with your regular water.....some people seem to have issues and some don't. I did.

do your test with ph corrected water and let us know the results. Don't buy a bunch of stuff yet.....