19,000 gallon above Ground Pool. Current Filter is Waterway 26" 400 lbs.

Pump Waterway 2 hp 2 speed R55CXFCM-0305.

Zeolite Sand. Was told that zeolite only required half as much as standard pool sand.

Problem- Poor filtering, vacum today and dirt returns next day. Tried conditioning filter durig back wash with no positive effect. Backwashed water apprears to be clear. Center pipe and laterals have no broken places.

Should I consider DE for above ground pool. What do you reccomend as a solution?