I use an Ametex tapwater filter from Home Depot $24.00. A decent 1000 gal filter will last you 2,000 - 2,500 gal w/o the need to change the insert (filter insert costs about $13 each). It has a convenient screw-on mechanism that allows it to be attatched to the kitchen tap w/o plumbing skills. Best if you want to remove chlorine/chloramine alone and you want to save money.