Date: Wed, 11 Feb 2009 08:56:03 -0500
From: Simon Lobdell
Subject: Water filtration
Depending on how quickly this change happened in your friends well, the well itself may be in trouble or more likely, your friend may be overusing the well and pulling sediment into their well.
I would not reccommend trying to throw filters at it until you figure out what the real problem is.
Simon Lobdell