Hello all I broke down and purchased my first RO unit today. My question is how much treated water do I want to mix with my well water. My water is very hard but I don't remember the exact reading and the PH is 7.6. It's well water but I don't know if that will help with this question. The store I purchased the unit from said to start with 1 part treated water to 3 parts well water. Is there a set formula or is it just done with trial and error until the desired readings are met. Thanks, Walter ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!