sorry you guy's and gals haven't heard from me but i've been very busy with school. well i do have some good news and some bad news. first the good news awhile back i had a battle with my RD and FH against the infamous callumis worms. i wasn't sure if i would be able to beat the worms; but i did thanks to chris a vet here in chicago. now the bad news my FH and my RD are fighting it out for space in thier 55 gallon environment. FH has out grew the RD's i hope i can find someone willing to take some RD's off of my hand.
i wish the best for them until i get a bigger tank i'm in trouble. i need a 200 gallon for what i have.
i'm gonna do some major cleaning then post pics. i have 2 FH that i'm not sure what species of FH i have. so with that said i hope one of my fellows MFK can help. see you guys and gals next time.

You have a lot of aggressive fish and a heavy bioload for just a 55g. You didn't note the size of the fish but they'll both out grow it. To stop the fighting in the mean time you could put a divider into the tank until you find a new home for the red devils. Also, by the way there isn't different species of flowerhorn ( I'm sure they're even not even classified as a species) its different strains.