CichlidFish.com - Fish That Think.

So i was at my LFS today and the had a male 6" Flowerhorn. Beautifull fish. They wanted 50 bucks for it but I talked them down to 40. So I have him in a 55 gallon. I did some homework on them and I hear that they are very aggressive and dont like tankmates. My question is do you guys think he'll be ok with an 8" Pleco and a 6" Albino Bicher? I'm hoping on the theory of since it doesn't look like the same kind of fish as him he wont be aggressive towards them. So far he's been ok but it's only been a few hours. 

I know I'll prob need a 75 gallon for him soon too, I just hope it's not too soon.

the pleco should be ok but the other no