I don't use any filters in the airplane except the screen in the carb. I filter the fuel before it goes in the tank and that is all. I inspect the carb screens once a year and in most cases, find nothing in them. In very rare cases I might find a particle or two of something but nothing the screen can't handle. If I were to use a filter in the airplane it would be the Walbro in tank filter as commonly used in chain saws and other equipment with great ..... and as suggested by others here.
Whatever you do, never remove the screen in the carb as suggested in some magazine articles. That is your carb's absolute last defense against dirt in the system and it is a very effective filter.