I bought a new water pump (Sedra Submersible 2000 Inline) to help me make my water changes easier and it does not seem to work. I have the 3/4" tubing attached to the intake and 1/2" tubing attached to the outake as directed as it does move any water, just makes a loud low squeaking sound, I also tried it in the water, and you barely get any flow at all, do you think I have a defective pump?