Totally sure about the aquaclear. The HOT seems to lose a lot of bacteria everytime you clean it from my experience. On the H.O.T. that I serviced the only place for bacteria to stay long term was the sponge. I'd take an aquaclear over a H.O.T. any day of the week.
There my be some additional media that I'm not aware of, but I remember it being a "cartridge" that was replaced when serviced.I suppose it would be ok with the additional biowheel, but I see that as an unnecessary additional cost.
I like a double sponge/biomax setup on an aquaclear. It's hard to beat IMO (unless you're doing a planted tank).
I will have nothing to do with any filter than has a cartridge. Just personal preference
Also, I dont know about the lakes once being an ocean...african cichlids are still just okay to me. Except Fronts. I love Fronts. They're the one african exception for me lol ( I know they arent Mbuna btw :grinno: )