Hi and welcome!
for your filter, I'd suggest getting some filter sponges and wrapping them around the intake and output of the filter. (please refer to picture for sponge placement) you can fasten them on using rubber bands.
You can also find filter sponges at any aquarium/pet store.
Wrap them around the circled areas:
Also, I'd suggest turning the power down on your filter.
If, by any chance your filter is a different model than this, you can still put filter sponges on the intake and output.
Good luck!! ~Saphira