Small black particles, milky water and organic smell from hot water from tankless
I have a new tankless hot water heater installed at my house. When I run hot water in the tub, there are always small black particles that are easily visible (about this size of small seeds).. sometimes the water has a milky color to it that always clears.. but water sometimes looks a bit dirty.. Also there is an unusual organic scent that I can sometimes get a hint of which I have never smelled before in water. Cold water does not have these issues.
Any ideas?