[darbyjudy]

Well I have never had any problems with buildup in the black tank so I am thinking that the additional water must be good. Since I found out that it does go into the black tank I am a little more careful how much water I run when brushing the teeth and washing the hands. With just the two of us we are able to go over two weeks without dumping the black tank. I do carry the blue tank for the grey water though. Wife still like to take the shower in her own bathroom.