Are you seeing any progress on pool water clarity?
It's very hard to tell. I have been obsessing over it so looking at it sooooo much I am trying to measure by seeing how deep into the pool I can see, but have yet to perfect that equation, lol.
Can you get a sample of the brown stuff and see if it is gritty (dirt) or slimy (algae)?
I haven't tried to touch it with my hand or fingers. When I get near it with the brush it instantly clouds up and spreads.
Did you note what your clean filter pressure was just after your deep cleaning of it (without the pressure cleaner running)?
It has been right around 17 since right after the cleaning. I have backwashed it twice in that time when it climbed upwards of 20.
You have only been running for three days with an proper functioning (hopefully) filter. It is likely it will take longer than that to clear the water with a sand filter.
Poopcicles... :?