Calvus mixed with hrp?

so theres this black and white striped calvus at my lfs and i was thinking about growing him up with some small hrp's because ive never had a african in my whole career but i think they are awesome fish.
how would it react with them.
hrp's are like really mellow cons and they stay small.
also theres a dwarf compressiceps pike cichlid. but hes pretty mellow for a pike.
oh and some cory cats. but what do u guys think?
the calvus is about 2" and is like 15 bux. they have tons of africans and this fish store but ive never seen a calvus there.

ok itll be a 55g tank. and the pike cichlid is only like 2-3" and the hrp is about the same side. and there are some juvie hrp's at the same lfs. baby calvus is same size.
and i got 2 juvi julie cories and 1 big skunk cory. and a bumble bee jelly catfish. its a mini mini version on the rtc.
thats at least what it reminds me of in shape of body and fins. it only reachs like 3 ".
how big do calvus get?