Do I need DE?

[sw_stupid]

I assume it is filter sand. I don't know I've never had any trouble. I do think that is what I see sitting on the bottom of the pool, in the cracks every morning - my pump runs at night. I just figured it is okay for some of the sand to come through, it gets sucked up by the pool sweep. I just thought of something - maybe I need to run the pump more. It is on a 12 hour timer right now. Should I turn off the SWG while bleach shocking? If so, why?
Thanks again,
Brad

[CarlD]

If you are blowing sand through, then I'm wondering if your pump is mis-matched to your filter and is too powerful. Your filter MUST have a greater capacity than your pump--or you get stuff blowing through. Most people have bigger pumps than they need.

If your pump is too big, you can get an impeller replacement that lowers the GPM of the pump.

[Poolidiot]

Carl,
How do you know if the pump is to big?