Your female borellii is acting quite normal. I have found that it is much easier to remove the female and let the males grow up where they are. As for her actions - she is ready to spawn again and should be placed with the male again. She is chasing her young because she sees them as a threat to her new offspring. (Even though she doesn't have a male to spawn with.) The female will quit caring for the fry at about the time you're talking about. I spawn my pairs in 10 gallon tanks with just a sponge filter and a fine layer of fine sand with some bulb plants and a small flower pot. The plants then are easily removed. Still, the best bet is to remove your female to another tank. Kaycy