Hey Reefers, I am in the first week of cycling my IM 20gal...purchased the IM DC Skimmer...from a big online vendor...but I am not sure if that loud humming sound from the "air silencer" which can't be controlled is normal? This is going to be in the room that I sleep in... Downgrading from a 120g to 20g...Need help in getting a better quieter Nano Skimmer that can fit in the chamber of the IM 20gal...any suggestions?