+1DJRansome said:Those traps are for like mollies and guppies. Really small space for an adult female and she may hold the fry longer than she should if she feels unsafe about spitting the fry.
With Malawi the female should be fine in the main tank for the first 18 days. Then put her in the fry tank until she spits them out. Remove her from the fry within 24-48 hours and put her back in the main tank.