My partner has a small cold water tank with just two fish in that I'm
currently looking after. the fish are (I think) ornadas (?) , one black one
gold and white. When I went tot he tank this morning the black one seemed to
be trapped under the airstone. (He forages in the gravel). He swam away as
soon as I moved it but he's very lethargic and although he swims when I go
near, seems to spend the rest of his time on the bottom of the tank.
Any advice?
Thanks