Ashful
Minister of Fire
Cool. When I moved into this house, there was mineral cloggage in the pipe tee between the individual hot/cold valves and the shower head, that took me awhile to pinpoint and clear. Made for a year of very wimpy and unsatisfying showers, until I knocked out some more urgent projects and got around to the shower. It was such an unexpected change to the start of every day, that I've since made it a priority to be sure I always had good shower pressure.
As to the black stuff, time for a water test? My last one was completely mail-in, very easy. They sent me a box of bottles, with instructions on how/where to collect the samples (eg. before/after softener and/or filter), and a shipping label to mail the whole kit to the lab for analysis. Prices varied from under $100 to over $500, but I had selected one of the mid-level packages in the $200's, which included everything I had wanted to know.
As to the black stuff, time for a water test? My last one was completely mail-in, very easy. They sent me a box of bottles, with instructions on how/where to collect the samples (eg. before/after softener and/or filter), and a shipping label to mail the whole kit to the lab for analysis. Prices varied from under $100 to over $500, but I had selected one of the mid-level packages in the $200's, which included everything I had wanted to know.