if your meter is spot on you might be better off using RO water
/agrees with others, that is crazy high
IMO your meter is out to lunch TMU max is around 500 ppm in regulated area's gov standard..
Unless your living in Ethiopia or some place like that in my area its 380 ppm..
Mind you the minerals are to large for the plant to absorb , Myth busted ,,
If it were true then you would not need any nutrients the water would have enough calcium at least right ????
And i guarntee you if you do not supliment Calmag your plants will show def very Fast
You need R/O water sir...
Are you softening your well water? That's not so good either.
I went thru same thing.
I use R/O filter on raw Well water and its made big difference.
Consistent quality water problem solved.