Maybe just pick up some used Korallia 3's or 4's and just have them on in the sump. It probably won't be a perfectly 100% detritus-free sump but the spots where it does collect will be hopefully smaller and thus easier to suck it up with a turkey baster.
In Big Als here in Calgary, they have a demo-reef tank with a sump that has 5 or 6 skimmers in it. The sump is so churned up that there is no detritus in it at all. So it's possible to have a clean sump but most of us aren't heavily overskimming like that (and I don't recall if the tank has any fish in it, so it might be all low-bioload stuff anyhow).
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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