(I pulled the picture, because it didn't add anything toward answering the question -- and you already have it in the other thread).
You asked what was collapsing the grids.
I don't know for certain, but I *STRONGLY* suspect that you've got too much pressure across them. I already had said that, but with the info that you are running the filters w/o DE, I think it's only more likely. Your original motor was smaller.
Also, I told you not to clean with acid first, very very specifically.
No one is obligated to take any of the advice given here. But if you are NOT going to take advice, it would save everyone time if you'd just say so. That way we could spend more time answer other posts from people who are listening.
Email me at poolforum AT gmail DOT com if you want to continue this.
Sincerely
PoolDoc.
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