What happens if you add a FW fish to a SW tank? [Archive]

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powerbuddy

04/23/2006, 01:16 AM

I just wanted to inquire what would happen if a FW fish would be added to a SW tank? Will it die instantly or just loose weight from the osmosis and die in few hours/days? Anyone has any experience from this before?

Freed

04/23/2006, 01:23 AM

Why do you ask?

cyclops23

04/23/2006, 01:34 AM

im still pretty new to the hobby, but the only FW fish that ive heard that can adjust to SW is a molly.

Sk8r

04/23/2006, 01:39 AM

Estuary fish go back and forth in the zone where fresh and salt mix, in riverine harbors, etc. The critical business, as I gather, is the kidney---if the fish's kidneys aren't up to the shift, it's going to die pretty painfully. The few that can transit are specially equipped to go from one to the other, but they make a rather slow transition, at a pace their bodies seem to feel is ok. The bullshark, scats and some metinnys can do it.