Operating & Cleaning a DE filter

[FRANCIS]

My Hayward EC-65 Perflex manual recommends soaking the nest in 20% strength muriatic acid blended with water 1:1. So why does Waste mention 10:1?

[PoolDoc]

Dunno.

Either will work. BUT, most DE filters do NOT need acid. Acid removes calcium scale, which is somewhat rare. TSP removes body oils, etc, which is universal

ALWAYS, do TSP first. Acid reportedly 'sets' grease, creating irremovable goo.