I think Im mad you have to FH in a 20 and moving them into a 55? I dont think 55 is big enough for one. Well whatever, as everyone already stated your fish are too young.
who said der always gana be in 55 for life i got over 10 tanks just waitin for them i like 2 move my fish as they get bigger i just see more personality that way and i feel they eat more like this. der only babies like u guys said ina 55 i think thats cool and as they get bigger ill move them up planning 75-100gals each
id have to agree with everyone else, fish is too small still. when the time comes you will notice a change in the female and the behavior in both fishes.
i have to say its 50/50 chance that they will get along with out the divider. and also its not a guarantee that one will kill the other.
i have 2 of mine in the same tank without the divider they get along but they do get very aggressive towards each other.