Brown well water clear at well head facet but is brown in house

Well water runs clear when sampled at the pump. But is brown at the whole house filter.
I have been having problems with the filter needing to be changed every 3 to 4 weeks. Ran water rom the well head facet for a couple of days until it was clear. Now the water at the filter is still brown and the filter needs to be changed in a week. The water at the well facet is still clear. Anybody have any ides or experience with this?

THANK YOU.

Brown well water clear at well head facet but is brown in house