right on , you have really crappy water, mine is 180ppm 6.8-7.2 from well, 0ppm fe, 60ppm Ca, 60ppm Mg, 60ppm K, I use r.o. anyway. So I wont try and ph balance with k,ca or mg and adjust with k hydroxide for up. how long have you been on the lower ph solutions? I was a 5.8-6.3 with 6.0 optimal target for yrs. I suspect that the ppm of calcium should be close to = of that nitrogen or potassium to make nutes available to or plants, any thoughts on that also. am I posting in the wrong place for this stuff