Well, I have really hard water also from our well. We have a soft water system then an RO system under the kitchen sink. That drops the PPM to around 35 with the PH steady around 6. The problem with the under the sink system is that it only puts out about 9 gallons a day and that is just not enough. I am going to build a filter system like Gpsfrontier did that should take care of the hard water issue. You can check out his design in his thread on building his greenhouse.