As someone who specializes in residential water treatment, I can truly say," If you can't drink your own water, you have problems". Places like London and Toronto area are pulling their water from the great lakes, which is about 7 grains hard. I put systems in where the water is 20, 40, 120 grains hard, or just so bad it's untreatable. And that isn't to mention Iron, Sulpher, bacteria, tanins... Sewerat is doing what he needs to do, and it isn't just for the fish. Some places just have bad ground water. Big city people are spoiled when it comes to pulling water out of the tap. Well at least the ones with lake water.