If you have a DE (diatomaceous earth) filter, you have the best filtration available for a residential pool, but there is a bit of a catch . . . the DE filter is the most complicated to maintain. In this section, we describe the process of cleaning the filter, step-by-step.If this all seems complicated (and it is) then no need to worry. You can always just call the professionals at Pool Stop and we will come out and perform this necessary service every six months for you.