Okay, my degree is really in physics but I took a minor in hydraulic engineering, so it sort of applies. Anyway, we live miles from the nearest town so we and everyone around has a private well. In this particular area we also have problems with iron in the water - which means iron bacteria - as well as calcium and other hard water problems, and finally, we get an occasional blast of sulfur. In reality cartridge iron filters work reasonably well, but they are expensive, high maintenance, and they don't work good enough for my tastes. Also, I like the idea of chlorine as an oxidizer since it eliminates almost all concerns about safe water. So, after getting about a dozen years of experience with a well and the associated equipment, a few years ago I put in what I consider to be the ultimate system. In one sense it is a shame that we need to use so much, but the risk with bad water is that every water appliance and all of your clothes can be ruined in one day. So I not only wanted fantastic water, I wanted double redundancy as well. We certainly have both! Any two filters can fail [including the water softener], and I won't see any iron in the house. Also, by adding the automatic bottom flush to the dwell time tank, most precipitates never enter the filters. And all of the filters automatically backflush and self clean as scheduled by settings made on each unit. Unfortunately, you don't even want to know what this all cost, but since this is a major home investment we splurged and bought the best - good for thirty years and very low maintance. I only need to add chlorine and salt a few times a year. I had made this up for a friend, but as engineers or scientists, or at least being of similar mind, I thought you could appreciate why this system is my pride and joy. :!!) Our water is wonderful! Of course, it had better be!!! Note that the picture looks a little skewed, but this is just some artifact from the camera.