I had the problem of mud ...

I had the problem of mud ball formation filtering water coming from one artificial reservoir preliminary treated in one DAF plant for algae removal.

The filter is double layer anthracite plus sand.

The problem was solved increasing the air+water backwash and decreasing the polymer dosage in the DAF.

The high turbidity in the treated water is symptom of some preferential way in the filter probably related with low backwash efficiency.

Also the quick clogging can be related with low backwash efficiency but also with the filter solid loading, incorrect sand size and suspended solid characteristic.

You can try to follow the suggestions of Mr Derek French and to do some pilot plant test(always the best way to follow) as suggested by Mr Coronado.