I have removed the top of the silencer from the tube and ran the extension silicone hose that came with it originally to the outside of the sump. This way you won't get salt creep in the silencer and it has never acted up since.
I can take some pictures for you if you need. I have owned a couple of different bbk skimmer and it seem to have the same issue with the silencer clogging up with dried salt water and it start to slowly sucking in water into the pump until it cloggs competely.
Let me know how it goes.
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