apparently anything as long as it has scales, scaleless fish (knifes, loaches, glass cats?) are apparently a no go
when i get back from vacation in august, im putting my chromides, mollies, and my neocardina blue shrimp in a 20 gal from my 55 gal because they need salt, and apparently my BGK and loaches arent suppose to have it
of course that will mean i'll have to move my clawed frog back from the 20 gal to the 10 gal
so i'll have:
55 gal fw
20 gal fw with aquarium salt
10 gal fw with clawed frogs (because he eats everything)
...and i used to promise myself i'd never catch MTS
some fish: mollies, chromides, dragon gobys, figure 8s, shrimp do need aquarium salt to live or thrive, otherwise they act depressed, and eventually die