Getting DE back into a pool is an indication of some type of problem within the filter itself. Although it could simply be a matter of using too much DE after backwashes, more often it means that a part inside the filter needs to be replaced. If you have a grid system DE filter, (most inground pools have this type) it could mean that the spider gasket in the multiport needs to be replaced, that the grids inside the filter are torn, or that the manifold, which holds the grids together, has cracked. Filters with “fingers” (most aboveground systems and some older inground systems) the fingers could be torn, the diaphragm gasket may need to be replaced, or the tube sheets may have cracks in them. Check your filter carefully to make sure that all parts are in good condition, and replace necessary parts. Empire also offers a “Clean, Soak, and Inspect” service on filters. This includes cleaning the filter elements of large debris, soaking them for 24 hours in a chemical solution, and inspecting all parts by hand.