Thanks for the response, Louis

I could place some of the small pond stones on top of the filter, or on the edge of it so it kind've holds off the intake. Both intakes, the lower one that's near the glass and the upper one that's near the water line are functional.

I have no other plants in this tank except the moss, the rest are fake.

I'm just worried about it emitting a chemical that could harm Gnag, or making my room smelly. Could it do either?