My tank (~115 gallons total) is in my basement. I have a slop sink that drains into a sump/ejection pump. I do about a 20% water change every week and the old water goes into the slop sink. Should I be concerned about the affect of salt water on the sump pump? If so, is there anything I can do to minimize the corrosive affects of the saltwater on the pump? I know I could "flush" the sump with fresh water after I dump my old saltwater, but I think that would require far too much water to be wasted.