Any scaless aquarium animals have a low tolerance of salt. Yes they can tolerate a small amount for a short time but it is highly recommended they be quarantined by themselves, or not in a brackish/salt water aquarium because of that :)
And Hedgehog... maybe I'll be asking you about my albino cory cat soon then lol!
Breed for the breed, not for the money; the words any REAL breeder would understand.
You must know nothing in order to know all, for all is nothing and nothing is for all.