Quote Originally Posted by PoolDoc View Post
If there is ANY algae, you must kill it before you can expect your filter to work well. Live algae plugs DE filters very, very rapidly.
To reiterate what Ben wrote above, you need to kill the algae first before your DE filter is going to be able to filter it out. Live algae clogs DE filters extremely fast! Don't let the pool store sell you a bunch of chemicals. Sometimes all that stuff makes the problem worse. If you need help with the chemistry and killing the algae, make a new thread in the algae forum and somebody will assist you with it.

Welcome to the Pool Forum, by the way!