I used to keep mine out for a couple days, but now I just put her back in. I think if you have the space, then giving her a break for a couple days doesn't hurt, but I personally haven't seen a difference in keeping her out a few days or just putting her back in the main tank. It's up to you.
I just recently stripped 3 from a young female dem and stupidly put her back into the main tank without letting her recouperate. She got stressed out and died.... so id def. say make sure she is eating and strong befre you put her back in..
I always wait a couple of days to let her eat and relax before putting her back into the main tank... I've done it like lil_flame33 and lost a female as well..... I feed her some brine and spruilina get her up and going then.....feed the main tank then put her back in and turn the lights off for a bit... Seems to work out great....
I'm learning myself and almost came here to ask the same question. I moved a yellow lab to a 29 gallon tank and she spit about a week later. I was curious how long I could leave her in the tank before moving her back to the main tank, and I've had her in there with the fry for about two weeks now. The fry are close to 1/2".
I was wondering if at some point she'd eat the babies or be agressive towards them. It hasn't happened yet.
I've been feeding her 3 times a day, not too much, in hopes of getting some weight back on her. After two weeks she's looking very healthy.
As long as the mom looks healthy, I put her back in the main tank 10 seconds after I strip the fry. If she looks like she got seriously picked at while she was holding (very ragged fins) or looks dangerously skinny, then I'll let her recoup for a few days. This has only been the case for me once.
*Note that the longer you keep the female out of the main tank, the more the other inhabitants will get used to her absence and they may give her a hard time when you put her back in. To minimize potential aggression, re-introduce her at night when the lights are out.
In general, a healthy mom is fine when returned to the main tank immediately after spitting. Also, after 24-48 hours you risk the mom eating the fry. So if the mom needs recovery time the ideal is to put her in a separate tank for a few days to fatten her up or otherwise treat her.