well.. that's the nature of a serpent star.. They will hide... I personally think that a serpent star is a better choice.. Like Golden said, the linkia's dont have the best survival rate.. A serpent star will also help in keeping ur levels in check as well.. If a fish dies, and u can not get to it, or dont notice, the serpent is going to take care of that for ya.... No worries, he'll eat it, linkia's dont do that, they are bacterial film grazers... So I voted for serpent star..
Phreak