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Brewing water

I'm working on my brewing water this summer. Water from the hose ain't cutting it. There are too many minerals in my well water. I'm getting astringencies in my beer. I'm going to start filtering my water with an activated carbon filter, and paying better attention to my mash pH.

 
The filtration
Activated carbon is a form of carbon that has been processed to make it have a very large surface area available for adsorption or chemical reactions. Due to its high degree of microporosity, just one gram of activated carbon has a surface area of approximately 500 m² (or about 2.17 tennis courts). Activated carbon is usually derived from charcoal (source: Wikipedia). 
 

·         Culligan - D40 water filter removes the toughest contaminants from your drinking water with 0.5 micron filtration. The Culligan D40 under sink water filter reduces Lindane and Atrazine (a pesticide and herbicide), lead, mercury, asbestos, chlorine taste and odor, bad taste and odor, and sediment from your drinking water. The Culligan D-40 filter also removes 99.95% of disease-causing Cryptosporidium and Giardia cysts from your cooking and drinking water

 

·         Culligan - D30 water filter removes tough contaminants from your drinking water with 0.5 micron filtration. The D-30 under sink water filter reduces asbestos, chlorine taste and odor, bad taste and odor, and sediment in your drinking water. The Culligan D-30 filter also removes 99.95% of disease-causing Cryptosporidium and Giardia cysts from your cooking and drinking water. The Culligan D-40 filter is recommended over the D-30 because it removes the even tougher contaminants Lindane and Atrazine (a pesticide and herbicide), lead, and mercury.

 

I'm also working on my water pH. I've been adding an acid blend to get my mash as close to 5.2 as possible. But now I'm going to work with Mash Buffer  5.2 by Five Star Chemicals to control the pH. This should also drive my efficiency upwards. Its contents are mono and disodium phosphate. I recently got my water tested by Ward Labs so I finally know what's in it.
 
 Contents of the Creekwood Aquifer
Calcium   [Ca] 101 
 Magnesium [Mg]   40
Sodium  [Na]   18
 Sulfate [SO4]   10
Chloride  [Cl]   37
Bicarbonate  [HCO3]   427