What is the best way to lower the hardness of your tap water. I have never seen a solution like seachem or API for reducing the hardness of the water. When checking mine it always seems to be off the scale. The Carbonates are within limits, but the hardness is always high. Ph usually runs around 7.5 from the tap but drops once in the aquarium to about 7.0. Any idea to make the water softer, what are the benefits, and where to get the products from.