Oh, here's something I also meant to ask you, Dudley...do you keep your AquaClears on low or high flow, or somewhere in the middle? Seems my research has indicated that these HOBs run better on the lowest flow setting (assuming debris is being sucked up through the intake stem at this setting) because the water in the chamber gets filtered and refiltered multiple times; I am running a 110 on my 60 gallon along with a second HOB on the other side, an Aqueon QuietFlow 75, and it seems like even on the lowest flow rate setting, this filter pumps out a ton of water for my two goldfish in there right now...