I have just purchased a nice 55gal tank from a good friend. I will be transferring my black moors to this tank once it is cycled. There are four of them and I may add one more. Now my question:
I've had great luck with the Marineland Emperor 280 Bio-Wheel.. You'll probably want the 400 for a 55-gallon, but they offer all three kinds of filtration-biological, mechanical and chemical..
Yes, that's a very common unit. It's got a media cage for putting charcoal or other media in, and the filters also have Black Diamond charcoal in them.. Here's a picture of my 37 gallon tank with the Emperor 280. Notice the black suction tube in the middle of the back-it sucks from the bottom, but also had an adjustable mid-tube suction to suck from the middle of the tank where a lot of the medicines end up. You can see my is half-way open.