[Bob I]

I would never discourage anyone who wants to use RO/DI water from doing so, that is entirely up to them, but I do consider the advice that Alan replace all his water with it to be not necessarily well thought out. Some of the more successful reef tanks in Calgary use tap water. I for one will continue to do so. I do believe that Alan's problems do not lie in the water, but that is my gut feeling only. I think his rock or sandbed may be at fault, and the addition of chemical goop to get rid of chlorine is, in my opinion, also suspect. I hope Alan looks at all the advice so freely given, and makes the correct choice.