Reverse osmosis membrane rejection is the specified percentage rejected for a given solute at a specific conentration, water temperature, and pressure.
(dissolved solid - typically NaCl[sodium chloride]),
Another characteristic of RO membranes that must be taken into account is that different solutes, like boron, fluoride, etc. will be rejected at different rates for a given water condition.
Needless to say, your results will vary depending on your water condition. Please consult relative data and/or call your GrowoniX consultant if you have any further questions.