I would pH-test my well water, and get that correct, first ... the RO units take all the lime out of the water, thus, raising the acidity, so be sure to pH-test it again. after filtering ... if I use my 5-filter RO water, I have to add calcium and magnesium, as the filters remove it all ... I found a natural spring in the hills, that pH's at 6.7, so my plants are happier now (soil-grower) ... it's worth the drive ... :jointsmile: ... P.S., listen to Xcrispi, he grows some OUTRAGEOUS plants :thumbsup: