Can you spray Diatomaceous Earth to the filter membranes?

[105ex]

I don't think there's anything wrong with your grids. I see evidence of a little blow by in my pool, too. When the grids are clean and suddenly this almost liquid material flows to the grids, I don't think we can expect it all to be stopped immediately. That's when the pores in the grid material are the largest, before any DE is coating them. I think you're doing it right.

Hal

Thank you for the reassurance, Hal.