My well water has a steady state nitrate level of approximately 30 ppm. When I do a water exchange I dilute my well water with nitrate-free spring water that has a similar GH. But this getting old. And soon with the addition of a new 60 gallon tank the volume of my weekly water exchanges will approach 50 gallons per week. I could install a RO system but then I will have to mix in salts and pump the water into each tank. I am too lazy to do that. Instead I will bite the financial bullet and install a resin system that will extract the nitrate from the well water leaving me with water with a nitrate level of <5 ppm. Then I can continue to use only my python system for water exchange.