Please help me.
I live in central Florida and have recently purchased a rural property with a well.
I had the water tested by a local lab and it is free of any biological.
When I replaced the toilet, I noticed a clay-like coating on the inner surfaces of the tank and there appears to be a slight cast in the water.
I have purchased a new pre-charge tank and whole-house sediment filter but want to flush out all the existing water lines before installing the new equipment. Can I merely add liquid chlorine at the point of well-pump-discharge and allow it to set in the lines, then flush?
If so, how long should it set?

If NOT, how should I do this?