After summer long use of a pool with normal swim traffic, ‘before cleaning’ pictures of a residential filter can typically look like the following:
Backwashing a diatomaceous earth filter, or simply stated, a D.E. filter, may give temporary improvements to water quality, but the longest lasting procedure you could do to achieve crystal clear and clean pool water is to do a full breakdown filter cleaning.
A full breakdown filter cleaning also allows for a careful inspection of the filter’s internal components. On occasion, grids/cartridges/manifolds may develop structural failure allowing for unfiltered pool water to pass through back to the pool and spa.