Here's a picture of the cartridge taken apart.
I presume the water flow is up the two holes into the INSIDE of the two pleated filter cartridges ... but WHAT is that thing sticking up in the middle doing?
Here is a picture of me trying to wash the larger pleated filter with a garden hose:
And here I am doing the same to the smaller cloth filter:
Unfortunately, even after two hours of that, the green slimy sticky gunk is still on hundreds of the thousands of pleats:
I tried brushing them off:
But I concluded I must be doing something wrong.
Q: What is the best way to clean a pleated pool filter?
PS: I'm doing it right now ... so any and all advice is welcome!