Yup read about cell pore in the TFH article. Not my kinda deal. Real curious as to why people want to change the material in the DeBruyn filter so bad when it works so good. My opinion, for what it is worth, is two part, don't knock it till ya try it, and if it works don't fix it. Boat Tampa, FL TBAS, SKS, AKA --------------- See http://www.aka.org/AKA/subkillietalk.html to unsubscribe