These triggers are reef safe and will get anywhere from 4-8 inches, so a large sized reef is needed to house them. It should also have a lot of rocks for hiding spaces. As with any large fish that requires a great deal of feeding, it will increase your bio-load. The biggest problem with some of these triggers is that a lot of them aren’t good eaters, and because they are not aggressive to begin with, this leads to some of them just wasting away. Care needs to be taken when getting one of these reef safe triggers. Can be somewhat aggressive so you need to be careful with small fish and inverts.