I have not purchased DE yet. I went by the pool store yesterday and they have something else called "filter aid". It says for use in sand and DE filters. Should I just stick with DE? I will get something and do as you suggested. Sounds good to me.
Does is look like this
http://www.aquachem.com/mp/v/index.jsp? ... 7010aRCRD&
or
this
http://www.gatzies.com/p-35625-hth-25-l ... 7AodqGcAGA
This is correct. That is what I've been doing and its been working well. Within 10 hours or so the pressure is up 5 to 8 psi. Time to backwash then. But its different each time it seems. Give or take a couple hours or a couple psi. None the less, Its working well for me.You should only add the amount of DE to increase your clean pressure reading by one PSI, more than this could be counter productive.