The problem is that you started off wanting one fish and have gone back and forth. Any of the fish that will make a grand display in a 55 are going to get at least 10-12 inches. You also said that you wanted something that could go with your 8.0 pH. That rules out most CA/SA cichlids as that is not a comfortable pH for them.
A 55 isn't too small for a trio of frontosas. Unless you're planning on buying a larger size trio for lots of cash, that's not even an issue. Frontosas don't grow that fast. That's why they are so expensive as larger fish. It will take close to two years or more to grow young fronts to 6"-8". They get to be 14" in the WILD, not in the aquarium.
once again, i apologize for suggesting to put an oscar in a 55 long term and retract that suggestion. that was bad advice on my part. i'm sorry. you would need at least a 75 long term. apologies.
visualeyes2 said:in my humble personal opinion, i would consider pairing the kenyi with something of a different color, like a red zebra (orange) or a lemon mel. they are a striking yellow with black highlights. hope this helps!
sploke said:How about a pair of gold severums or the rotkeil sevs, the ones with lots of red on them. Really nice fish, and a pair would do well in a 55. You could probably even do a school of larger tetras as well, the sevs don't tend to be overly aggressive.