20-30 damsels or cromis in a 120 reef?

[terryp01]

Firefish are probably the worst fish to place in a 120 gallon. They are sold as fish which can get along with multiple fish in the same tank but, in my experience, you will end up with two. A dominant high swimming fish and a beat up smaller fish that hides in the rock.

Chromis (green or blue) would be the best but I would not recommend any more than 8 of these at one time. If you have other fish they may not get along with them.

Good luck on your choice.