My tanks dimensions are 72 1/2 x 18 1/2 x 23 3/8, I use emperor fliters, 2 marineland jet pumps. I suggest the jet pumps they circulate the water really well as well as airation.
Just be paitent when starting a new tank let the water cycle for a week or so. Watch the behavior of your fish this can tell a lot about the health of your fish.
African cichlids lake malawi except for my two frontosas
When you see signs of stress in your fish, you can then take steps to identify the source of that stress and then to resolve it before it becomes a major issue.
If you're looking for a unique way to stock your new tank, give freshwater shrimp a try.
If your fish is suffering, you may want to consider euthanasia as an option to humanely end his pain.