maybe you could arrange it differently, but i've noticed that the tanks i like most are when things are slightly "crowded". as long as the aggressive corals have enough space to grow, less aggressives can actually coexist and bttale for space without harming each other. I see lots of places to put frags with things how it's set up now, but this is the reason i moved up to a little larger tank, more space for me to dump more money into 