Klein or Pyramid Butterflys

[Stutters]

Hello all

i have a question and I'm hoping some experts can help me out.

I currently have a fox face chilling in a 6x2x2 tank and has a super large sump. Plenty of rock etc etc.

I want to add some butterflies to the tank. Websites vary in what they say in terms of space and size - This is a fish-only tank and I'm trying to avoid aggressive species and fighting

So-

I was wanting to buy anywhere between 2 or 3 to 'swim together' I'm aware they don't really group but they kinda just stay in the same area. I guess my main question is will there be enough space or will there be hyper aggression?

 

[vetteguy53081]

Klein I stays fairly small, under $50 and will aptasia on contact
Pyramid which now run about $125 are excellent community fish and rarely bother coral

 

[Zionas]

Which one is the hardier fish though and is Klein’s usually reef safe? Pyramids are plankton feeders that’s all I know.