Koran Angels

Anyone have experience with them? I bought my first angel today and it is a koran. She looks pretty happy in the tank right now.. but will they die with no forewarning? I noticed sometimes she swims a little slanted. Any tips?

 

They always seem to swim slanted. I'm pretty sure that's a normal thing. All the ones I've had have done that.

 

I heard that they need atleast 200 gallons and that they're very aggressive?? Mine has gotten along VERY well with all of my fish and seems really happy in my 55 gal. He/she has been so sweet.. never even went after another fish.. and is actually best buddies with my completely loving, docile saddled puffer. It's a tiny baby, though. I have been planning on getting a larger size tank. I suppose he/she will be alright in my 55 for the next 6 months to a year, right?

 

Id imagine so for size... lol My blueface only grew half an inch maybe in the 4-5 months I had him.

I now have a Adult Passer Angelfish... Every Large Angel Ive owned seems to swim at a slant for some reason... I think that may just be part of their nature.