I have a 75 gallon heavily planted tank. Currently have lf zebra danios, sterbai cory's, zebra otos, threadfin and celebes rainbows, and some blue eye forktail (furcata) rainbows, still small. I recently purchased 2 german blue rams. Think they are both males. A little chasing, nothing lethal. Anyway my lfs has just gotten in some apistogramma: cacatuoides, agassizii double red, and trifasciata blue. They are young and not too colored yet. Sexing may be difficult, but not impossible. I was hoping to get two pair, probably the cacatuoides, along with the agassizii double red, but may the trifasciata blue. Questions are will there be issues with my other fish? Is this too many with the current blue rams. Do you recommend just one additional pair? I would wait to see how one pair does, but these go fast and they can't get them often. Also, not interested in breeding at this point. Any suggestions and which species?