Well, if you're putting it in a 50g tank. I don't think the French will work. It will get to be a big size not only horizontally but vertically. And Asfurs aren't THE best... they are a good angel, but I would suggest a Half moon or Maculosus angel. In my opinion they are the best angel for captivity. You could get a juv or small adult around 3-5 inches, but what all is in the tank? and what do you have for filtration? TJ