Picked one of these up on a whim for $20. Just wondering if anyone's tried one and can review?

I intend to use it on my Perflex EC65 for a more thorough backwash, the idea being you can push it through the waste valve and spray upward toward the 'fingers'. At the end of last season I took the filter apart and was surprised how much DE was caked at the top of it despite regular backwashing.

If I don't hear from anyone, I'll do a before and after later this season.

Thanks.

ChuckD