ok i get home from school to find my biggest molly dead from what looks to me like bloat. i know mollies like to be in groups so rather than getting another i decided to ease the burden on my tank by returning the other to the fish store. but now my fish tank seems oddly empty. is there any large(ish) fish that would be ok in my 5 gallon with the 6 tetras and the cory? by large i mean like the size of a goldfish or my molly that died.