10-20-2010, 10:23 PM
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I'm not a big fan of breeding traps, never used one but seems a bit stressful for the fish, being able to see all the other tank mates but not being able to interact. Did you take that video right after you put her in the trap? That could be the main reason for her heavy breathing and why shes more subdued now. If she stays relaxed and looks at easy I would think you could keep her in there for a couple of days with no ill effect, but you need to remember even pregnant fish like room to swim.
On a side note I've had platys that fat looking for a week or more before finally giving birth its all just a matter of its time when its time.
As for tank size you could probably use almost any size tank as a breeding/nursery tank, I'm getting ready to setup a 10 gallon tank for this purpose but you could probably use a 2.5 gallon or so too just as long as the sole inhabitants are the mother then the fry once they are born. And chances are the mother wont eat any or very few of the fry born until you figure out thats shes given birth and can move her back to the main tank.