I got a pretty new female betta today. Going to put her in a 10g divided tank with a male and some aquatic frogs. The employee at Petsmart and I were talking and he made the comment that hob filters scare betta and recommended an under gravel filter. From what I read under gravel filters are crap so I don't really want one, however his comment about it scareing the betta made me wonder. My betta doesn't seem scared. Anyone else ever hear this?