Live algae will clog up a DE filter fast! I'm sure that is what is happening in your pool. You need to kill the algae. Give us some more information about your pool. Please fill in the specs into our pool chart which will make it easier for someone here to help you.

Pool Chart Entry Form

We will need some current water testing results taken with a drops-based kit -- no test strips.

Also, tell us exactly what all you have put into your pool meaning ingredients and not just 'shock.'

Add DE to your filter.

Welcome to the Pool Forum!

EDIT: When you write a post, it goes into a moderation queue to wait until one of us mods it in. So, you won't see it immediately. No need to make a duplicate post. It will appear! (I deleted your other post.)