Interesting subject . The first thing that jumps to mind is the swamp water thing . A little is good for microbes soooooo probably more is gooder . As for chlorine I have heard some stuff about if you take long showers that it releases chlorine gas which can be harmful . If this in fact is true then maybe the water that you put in the bucket overnight or for a full day should be hot water so the chlorine is already prone to "depart". If you have any access to swamp water then I would go for "The Full Monty" , that is to use IT only .Good luck .