My siver molly has been pregnant for about 7 weeks, she's HUGE. Today she started resting on the gravel and seemed a bit agitated. I've popped her into a breeding net which is about 6 inches square. How long can I safely leave her in there? Should she be put back in the main tank overnight if she hasn't given birth?This her first batch of fry. Can't leave her in main tank because I have large tetras who eat small fish.