white film on water surface
I have quite hard water/rust in my new home. My plumber suggested that draining the holding tanks might alleviate some of the rust issue because the house was unoccupied for 7 months.
I ran the hose into a basin to watch the water quality and when I stopped I noticed there was a film on the surface, sort of like if you saw a tiny amount of gas in water, but it didn't have the shimmer/rainbow look of oil, rather it is a whitish color, like a layer of slime.
When i completed, i let everthing run for awhile and then ran some water into a clean basin inside. The inside tap has a britta filter on it and there is a whole house sediment filter after the holding tank.
I let this sit for several hours and sure enough the film has appeared, though not nearly as severe.
I am going to have the water tested(it passed potability testing on the home inspection) but am trying to figure out what the heck is in my water.