when i first started my reef tank 3 yrs ago i started with inexpensive damsels and they were too aggresive so i had to break down my tank and get them out because i could never add any new fish-well ill never learn-i bought a koran angel when it was small an inch or so and now its 4 inches and eating all my colored zoas which i love-while a beautiful fish i need to get it out-i like the corals more-do i have to break it down again or is their some other method.probably not-but let me know