I read something that is troubling me

[coral reefer]

Eric Borneman, author of "Aquarium Corals" states it this way:it is like the neighbors that live in your neighborhood. They could be not the best of neighbors but through time you get sort of use to them and they don't bother you as much. Sort of like corals, the more things stay the same the more likely you won't have many problems with your corals sending out nematocysts, sweeper tentacles or mucus(other toxins into the water). As soo as you add another coral or change the placements of corals or add another coral, all bets are off and the fighting will again begin.