My pair of Synspilum and Red Texas are about to spawn again in their 55 Gallon tank...The female has cleaned the slate piece and her egg tube is dropped down,....so the big problem is that their fry, which hatched about two weeks ago, are still swimming around with them. I want to keep the first batch of fry!! SO THE BIG QUESTION IS : How long do I have before one of the parents starts picking off the first batch of fry??!!!!