GSH are definitely less hardy the FHM. I think FHM could darn near live in toilet water and thrive! GSH are not quite so adaptable...
Definitely get those bull minnows/banded killies, they'll be a great addition to your forage base.
If you hand sorted them and only found 1 questionable fish, that is good. The "horny head" chub may have been a male FHM. They actually get horny protrusions on their heads when they are sexually mature and in the breeding season.
