Your Swimming Pool DE filter is leaking back into the pool

Be sure that the suspected material on the pool floor is actually DE. Pollen, chemical residue and plaster dust often look like DE. You may have a tear in your filter elements, replace if necessary. Make sure that you assemble the internal parts properly! Check for air leaks, as this will cause the system to leak DE back into the pool. If there are air leaks, install a check valve between the pump and the filter valve.
▪ See Replacement Grids
S.Merillat®