SylvanLMP
I am glad my suggesting the 4″ vent worked out for you.
About putting a filter directly on the pump DON’T DO IT.
You see if this filter gets plugged up you will put this pump under excessive restriction and possibly burn it out if it isn’t thermostatically protected.
you also lose all water supply when this filter gives up the ghost.
What I would suggest is having a non ferrous storage that is approved in your local code.
Using this tank as storage you can then use a smaller well pump and use this hydro-pneumatic storage tank to create all the pressure and volume you may need for future demands.
Now you have several choices for example
1- Filter all the water leaving this tank
2- Filter the water only at point of use and use the unfiltered water for toilets and lawn sprinklers
3- Treat this water in the tank.
The great idea in not using a demand type of pump is you have no storage capacity in case of power outage at least with a tank partially filled with a little pressure you still have some water pressure and the volume .
Ah Decisions huh? 
