All this good talk about AC
's and Im going to have to set up one of the AC70's I have laying around that I got on craigslist!!
I have two HOB
's on my 46g - a Penguin 200b - absolutely silent and I love it to death, and an Emperor 280 - obnoxiously noisy despite a new impeller, manifold and pickup tube assembly straight from Marineland. It sounds like its percolating coffee, and the tank is in my bedroom 10' from my bed.. well, you can see why it is irritating!
46 Gallon Bow F/W: 4 - Zebra Danio's, 2 - Red Platy's, 2 - lg. Silver Dollars, 1 - Pleco (4.5"), 1- Gourami, 1 - Cory Cat, 1 - mystery snail, 4 - Cherry Barbs, 1 - Black Molly