Posted: Sat Dec 15, 2007 5:23 pm
I don't have one, but have read a little about them in the past. They're somewhat comparable to the Aquaclear, which is more popular and seems to be regarded more highly. Emperor 400's are supposed to work fairly well on nearly full tanks, but don't operate as well as Aquaclears at lower water levels (but both are quite noisy if the water level isn't high). Yours has a bio-wheel? You'll have to contend with a splashing sound if you do.
I can't help you with your question about the intake extension tube. I have used Aquaclears, which also have an intake extension, though, and whether or not I used it would depend on the height of the container and how far down I wanted the tube to extend. I've found that getting the intake closer to the bottom is better for cleaning (although no filter will pick up everything), and have at times had to shorten the extension tube to get the intake where I wanted it to be. Hope this helps a little...
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-