I need some advice about hard water from my well. California well water is often laden with minerals that cause some plants to sicken or die. I am considering adding a filter or ??? to my greenhouse waterline. What kinds of devices will work to filter out the minerals? I have always read that the water softeners commonly used on houses will kill plants. Have some of you experienced this problem? What kind of filter systems might be used instead? Has anyone installed a filter system and if so, what brand name did you use. I am also considering the use of water saved during my rainy season, but I have no idea how much water I use in the greenhouse over a year. Have any of you attempted any of these solutions, and how did you go about it. Thanks for your discussion on this. Marguerite English