I am not sure what is happening here, and my pool folks haven't a clue.
My skimmers are newish, so I only have a season or so with them.
I can feel suction in the skimmers, and there is good water and debris flow into them. The issue is that the basket doesn't fill with leaves - the leaves just collect in the skimmer well and float on top.
When the shallow skimmer housing was leaking (the source of a long mystery that is now over) and plugged, the deep skimmer was super powerful - like a vacuum!
When they are both on, they seem to work fine, but nothing gets drawn down into the water in the basket.
I have backwashed thinking that would work. The filter pressure is seemingly ok and the backwash didn't do anything.
The pool people were out last year and this year and all they say is: It's the weir doors and they replace or manipulate them. I don't think its the doors. As I said, the leaves get in just fine - they don't get sucked downward.
Can anyone help? They want to come and degrease the filter grid pak thinking the pressure is too high. I don't know how that translates to the skimmer unless there is too much back pressure on the skimmer line. Having said that, the all valves open pressure on the filter is 20psi which is totally normal. I have a floor turbo cleaning system with a bypass valve to regulate the turbo/return pressure. When that is activated the pressure is 30. When turbo is on like that the PSI always jumps.
Thanks for any help on this mystery!