What causes diatomaceous earth to accumulate on the swimming pool bottom?

Answer 1

I think you have a fault pool filter. The filter is filled with diatomaceous earth to trap algae and other particles. When there is a 'filter' to trap the diatomaceous earth and these other particles inside the filter until you clean it out. You probably have a leak so that the diatomaceous earth flows out of the filter together with the water that circulates trough it Correction: The filter is not "filled" with D E. There is only enough D E to lightly cover the internal grids. If one of them is torn or has a hole in it - there may be more than one bad one - you will get D E back to the pool each time the pump is turned on. Turn off the circuit breaker, releave the entrapped air from the filter, open the filter, remove as much De as possible then remove the grid assembly. Inspect all 8 filter grids for damage or tears and replace. When in doubt as to age of grids - replace. Reassemble filter, turn on the power and pump, add the correct amount of D E - see instructions on bag of D E - you should be ready for another 10 to 12 months of filter service before it has to be done all over again. This does not eliminate the need to back wash the filter as needed each month.