Stressed out clown?

[KVYA]

Ever since my male clown died, my female has been swimming very fast from one end of the tank to the other.
Ammonia is 0 and nitrates are about 2-3
Should I buy a juvenile clown to make her happy?

 

[Denali08]

Probably looking for him... I have always had better luck with a pair. Might be a good idea. Just get one smaller than her.