Filter Problem???

[Poconos]

Diatomacious Earth. Pulverized diatoms. A fine white powder used in DE filters specifically designed for it. Filters better than sand. Cheap. A 25 pound box will last many seasons and is at pool stores, Home Depot etc for $15 give or take. Also available in smaller quantities. A cup I'm referring to is a 16 oz. cup. Mix in a pail of water before pouring slowly in the skimmer. It will coat the top sand layer. Also...AVOID BREATHING THE DUST. Won't kill you and is inert but can cause silicosis when trapped in the lungs with prolonged inhalation.
Al
Just saw your other question. Being 25# short should not be any big deal. Also, gauges are cheap and you will need one that works. Under $10 at pool stores.

Also found this thread.
http://www.poolforum.com/pf2/showthread.php?t=6744