"Non potable stuff" with bleach?? In a fresh water tank? Why???
What kind of non potable stuff is it? If it's like the non potable water we have popping up all around our city parks etc. it is just somewhat sterilized sewer water from the homes. I hope to heavens they didn't fill their fresh water tank with something like that.....I don't know that I would ever use it again if they did. Is the water sort of green looking....?