@Michael W, The photo chemistry is designed with distilled water in mind - any other water is hit or miss.
Buy Yourself a distiller ~ $200, pour some water or filter some water and fill it up with it, wait for the distiller to complete, then check the thick gunk on the bottom of the distiller - this is the mineral, micro-bacteria etc. etc. content that gets into the emulsion when You process it without using distilled water.
Rubbish. Film and chemistry are designed to be used with tap water.
I stated clearly at the start of the thread that I process multiple rolls per week using this water and have never had a problem.