Thats crazy.
Have you actually observed them harassing your fish?
Can you get it straight what was in your 55g, how many fish where in there?
A 7" Raphael, 3+ Gourami, 5+ tiger barbs, a 24K Pleco, a Royal Pleco, 4 leporinus Faciatius, an indertiminant ammount of Clown Loaches & a...