Fish compatibility question

I am looking at buying a strawberry psuedochromis from the sales forum on here and had a question about compatibility. I have a YCG, a false perc and a maroon clown that will eventually be leaving if I can ever get him out of the tank...but thats another story.

Would the Strawberry Psuedo and the YCG be aggressive towards one another?

They will be housed in a 45g corner tank with lots of crevices, perching areas and hiding spots. I am worried about a fatal fight, but I think I have enough areas for them to hide. I am really worried about not ever seeing one of the two (most likely the YCG since he is smaller) and having a "ghost" fish of sorts that I never see.

The following is from : http://www.marinecenter.com/fish/pseudochromisdottybacks/strawberrypurplepseudochromis/
"This little beauty can be aggressive toward other fish small mild mannered species, especially in the restricted confines of a smaller tank."

Thats what worries me. Does anyone know if I am being a little over cautious or not?
 
Ive never had a YCG.. but youve seen my bicolor psuedo.. the devil himself. Him and the diamond head goby hate each other.. but the goby is always in his cave while the psuedo is always swimmin around soo there always good to go.
 
Adding anything after the psuedo will be tough. They get real mean. I doubt he would bother the clown goby but it's not a good choice if you want to add other peaceful fish!
 
Thank you both, that was an easy enough decision. Very striking colors, but a bad personality.

I guess the addage rings true, no matter what she looks like, some fish some where is tired of her aggressiveness.
 
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