Oddly enough the water tastes fine, we do have a filter system inplace for the well. It's just that every couple of weeks we start to see a blue residue building up in the tub. We had him retest it but he claims it tests fine. He says, "maybe it's the fixtures"....

I don't buy it.
Anyways, I figured I'd install a secondary filter in the kitchen where we get most of our drinking water supply.
Thanks for the feed-back -