mbuna don't do well in breeding nets, they most of the time will swallow their fry instead of spitting in the net.
If don't have another tank you will have no where for the fry to grow out. They will get eat in the main tank in a hurry, and in the breeding net you might end up w/ 30+ fry so there will not be enough room for them to swim, they are born fairly good sized
What you can do is count the days up since it spawned and after 18 days move the lab to another place. They usually will spit at 21-28 days.
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