we have the NOVA system also...installed it just about a year ago....very pleased with it. I most likely will have NOVA come back to install the softener that they carry to take care of the calcium. Recently a young lady came to the house to conduct a 'free water test' (we responded to a post card, the name of the company seemed to suggest that it was connected with the city water department, it's not)....the test showed zero chlorine in the water coming out of our house tap. However she went on to 'trash' the Nova system saying that it wasn't doing anything, used some scare tactics and advised us that we should rip it out and install her $6K model... hello young lady! What her test results did show is that the hardness was 9 on a scale of 0-10 (0 being the target)...this of course is subject to her tests actually being valid.
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