09-23-2010, 01:29 PM
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The hatchets will be no problem with either angels or Bolivians. On the angels, it is a bit of a risk, but at 3 inches (including fins I assume) adding another 4 might not be problematic. Perhaps, if you really like angels, find a good store that will take them back in say a week if trouble occurs.
Get the Bolivians at once; in a 55g I would say 1 or 3, remembering that if 1 you will not want to be adding more later, unless you can be sure of the sex. I have had a beautiful male for 18 months in my 115g tank, and 2 months ago I bought a female. They have twice spawned, and the second spawning was quite successful (though the fry did get eaten). But in between spawnings, the male is pretty rough on the female. He views the 5-foot tank as his domain, clearly. He also makes it obvious to certain other fish from time to time, though not leading to injury, but he is the boss in there.