I had to put some Vaseline in the impeller shaft in my AquaClear 110. First thing was to empty the filter (be careful, water will splash) then you twist the motor to the left, and it should come out.
After that, I lifted the green impeller out of the metallic shaft. If you look at the top of the green impeller, it has like to little notches, squeeze them to get the green impeller out, then apply a bit of Vaseline to the shaft where the green impeller was.
After that, I apply a bit of baseline to the metallic shaft where the magnet with the green impeller mounts.
That's what I did to get my filter to quit making that squeezing noise. I think this same instructions came with your filter's manual.
After that, I lifted the green impeller out of the metallic shaft. If you look at the top of the green impeller, it has like to little notches, squeeze them to get the green impeller out, then apply a bit of Vaseline to the shaft where the green impeller was.
After that, I apply a bit of baseline to the metallic shaft where the magnet with the green impeller mounts.
That's what I did to get my filter to quit making that squeezing noise. I think this same instructions came with your filter's manual.