I have this same skimmer. Have you tried simply letting it overflow and let the output collect in a bigger bucket? I did when mine was overflowing like crazy and it poured out about 4 gallons of colored water before it stopped overflowing. I filled my ATO reservoir with mixed saltwater so that as the skimmer was dumping out gross water, fresh water was coming in. Use a white bucket so it's easier to see.
Best case it's clearing out a ton of organics for you. Worst case you do your weekly water change this week and you end up in the same spot.
Best case it's clearing out a ton of organics for you. Worst case you do your weekly water change this week and you end up in the same spot.