adding a new fish

[jcb19742003]

i have a 20 gallon with 2 blue damsels which are doing very well i want to add a flame angel and was wondering if they would get along and if a 20 gallon tank is of sufficient size?

Flame angel would be fine, IF the damsels are Blue Devils, then, you might have a picking match.. They are very territorial and pugnaceous

[HoopsGuru]

Is it a 20H or 20L? Obviously, a 20H will have much less territory and surface area, both negatives for the proposed introduction of the flame angel.