Around here, where you have water that smells like rotten eggs, they recommend using an old type standard galvanized pressure tank rather than bladder tank so that the water makes contact with air. They say this causes the sulfide gas thats dissolved in the water to oxidize and releases into the air. I put in such a tank on the assumption that I would have the problem since my nearest neighbor does, but I have never smelled any such smell from my water, and frankly wonder whether my water has the problem at all.