Good morning Richard. Today's the day of the big biz party I'm hosting so im about to be run ragged here prepping food for 72 but I just wanted to check in on your progress
With the amount of silt you're dealing with due to that mesh cover straining those leaves for however long, I'd be inclined to keep letting it drift to the bottom before disturbing the water again. Its unsurprising to me that its collecting in drifts...that's how mine did.
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(Mike, Richard is trying to let the water clear to help determine his filter function AND combat fine silt.)
So if you can stand the wait, I'd just keep keeping on a bit longer to have a clearer view for a very slow vac to waste. If you wanted to open the main drain just a wee bit more (provided it doesn't clog...and not full open, just turn the valve another inch) and then put a white sock over a return to see what it collects (just for a few mnutes), it might speed you up a bit on the filtering front and give us some useful information.
How much FC have you been losing overnight? And how much have you needed to add each day?