I didn't purchase the skimmer box. The skimmer was quiet then I woke up to a loud vibrating noise. I unpluged the skimmer. Then I put it back on and it was still vibrating. Then I touched the skimmer and moved it and it stopped making noise. I adjusted the back two screws, but the skimmer doesn't sit solid on back of tank. With the Red Sea Prizm it has a screw that keeps it from moving. The two screws on the remora don't really hold the skimmer in place. The tank is a 30 gal
high tank. Any suggestions on how to keep skimmer in one spot so it doesn't start making vibrating noise?