"DK" wrote in message
The second filter is the 5 micron charcoal taste and odor filter.
Do I leave the 3rd filter empty or do I put two of the cheaper 5
micron filters in the 2nd and 3rd positions?


This may vary depending on exactly what you are trying to filter out.
1. 20 micron
2. 5 or 10 micron
3. move to where the kitchen and ice maker is fed and use the charcoal