The most effective type of pool filter is Diatomaceous Earth, or D.E. Filter. It works by sifting our pool water through its series of grids inside the tank. The grids filtering element is the layer of D.E. powder. If running your filter system and you notice this powder is in your pool then you may have a torn grid or multiple torn grids. If this is the case, follow this "How to", step by step, to get your filter back up and running.
To remove the grid assembly from the D.E. filter, find the demarcated handles on the manifold top and remove. The assembly will need to be disconnected from the manifold pipe, this should happen as you lift the grid out of the filter base. The D.E. grid assembly may be quite heavy due to the saturated D.E. powder and debris. This may take two people to lift out
Looking down onto your filter grid assembly without the top manifold it should look as pictured. In the array of grids you can see there are seven "full grids" and one "partial grid". the location of the partial grid is important. If the partial grid is in the wrong slot when installing the assembly, the manifold pipe be unable accommodate the grids.
If for some reason you must remove all the grids and start from scratch, the bottom manifold may have a helpful guide. The base's outer support ring has a wedge cut out for where the manifold pipe should be located when the assembly is inserted in the tank. When installed, the partial grid should be covering half of the wedge.
Replacing the grid is done in the opposite motion. To ensure the grid is properly seated, make certain the main pipe of each grid is sitting on top of one of the small round place markers on the base. There are finned guides that the grids must fit between as well. These points are marked on this step's picture
Using the handles we used to remove the assembly place the filter grid assembly into the filter body. When placing the grid assembly, align the manifold pipe inlet and manifold pipe. As the grids are lowered into the body, be sure to align the manifold inlet with the filter inlet pipe. These must be connected for water to flow correctly through your filter system.
Place the small tube spacer on top of the manifold covering the lock nut.
To coat your new grids with a layer of D.E., locate the skimmer closest to your pump and filter system and remove the lid. You may want to wear a protective mask, as the D.E. particles may be harmful if inhaled.
While the pump and filter system is running scoop 4 to 6 pounds of D.E. powder through the top of the skimmer. The D.E. will be run through the filter and caught by the grid fabric.