I know I've seen a few videos online where mouth brooding females were dip netted out and forced to open mouth in a small fry tank to release the fry. It was noted if not dipped/forced quickly female tilapia may tend to swallow some if not all fry.
Yes, I found this works if you do it with eggs in the first few days (not the fry stage). Problem then is you need to make an incubator. I have found all ways are possible, but little differences in how each person does a task will eventually determine which way works best for them. Lots of trial and error.
I have found the least stressful(without loss) way to do it is pull out all other fish and leave the mom alone and go thru the natural process. Don't get as many cycles per year doing it this way, but I'm not doing it for mass production.
Others cap the tube she hides in and moves her to another tank. All depends on your setup and what you have available.
