[Gutz54]

I just read an opinion piece about emptying the black tank and then the grey water tank afterwards which we all do. In this story the writer said that after you empty the black tanks you should shut off the black tank valve before you empty the grey water tank?? I have always left the black tank open when I empty the grey one?? Does it matter ?? and why?? Also do any of you dump some Clorox down your toilet sometimes to help with the smell?? Thanks