when you plug in your filter dry (like you have the lid open in the pic) does the impeller spin?
I also agree that your canister may be too close to your aquarium.
24" is the minimum depth. this allows gravity to work in getting the filter going.
with a reduced depth, the motor has to work much harder. this could be the problem as well. can you lower the filter?
I also agree that your canister may be too close to your aquarium.
24" is the minimum depth. this allows gravity to work in getting the filter going.
with a reduced depth, the motor has to work much harder. this could be the problem as well. can you lower the filter?

