Long time reader first time poster. In my masterbath I have his and her sinks and I get a slight oder from the water and every once in awhile I will get a black slime. The oder is not strong and goes away after running the water for few seconds. A few years ago I installed a filter on one sink and that seems to be the worst offender for smell and slime today. I clean the areators every couple of weeks and the faucets are Moen. Anybody have any ideas what this black slime is? Oh yeah I am on city water.