Your Swimming Pool DE filter short cycles even after I backwash

The filter elements may be clogged because of an accumulation of chemical deposits. Clogging is accelerated if chemicals are fed through the skimmer, operating your filter too long without DE after starting the pump, or operating the filter without DE. DE must be added as soon as the filter is full of water, and the pump is putting out a steady stream of water. Refer to your Owner's Guide for the amount of DE your filter requires. Biguanide based sanitizers (i.e. Baquacil, SoftSwim) can cause short cycling.
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S.Merillat®