Originally Posted by BillFarthing
You guys are making a 1-part nutrient way too hard. Too much potassium is going to lock out magnesium with the NPK values given here. Just run 100 ppm Nitrogen dosage in veg. Run 125 ppm in flower. Don't go over 150 ppm N.
I haven't had any issues with RO water, but you can always add back 50 ppm or so with Cal-Mag. Humic and chitosan are incompatible and will probably cause precipitation.
If anyone wants to run a pure elemental PPM test scenario, you can use the Feeding Calculator here, on the send tab option there is a PPM option
Keep in mind, this is elemental PPM, not metered PPM, so approx 3.8 grams per Gallon would give 100ppm Nitrogen combined (not including small amount of nitrogen contribution from the included organics)