My Umbee breeding project.
Since my male (14" at the time) is significantly larger that my female(4" at the time I bought her), for her safety I placed a divider between them. At the time I had 3 umbees in a 300 gallon tank all separated by a divider.
I bought my female at about 4". She started laying eggs at ~5". I have been conditioning her since I had her. I have and continue to fed her and the male a varied diet of beef heart, worms, store bought shrimp, and pellets. I have had her for about 4 months now and she is currently about 8".
She layed eggs 3 times with me and this batch (batch #3) was the first one ever fertilized. I had 2 males ( 11" and 14") at the time I bought her and they paid no attention to her and she layed eggs (batch #1)-none hatched. The two males were always trying to fight each other through the divider. Once I sold my smaller male, the other male (14") started to pay more attention to her. On her 2nd batch of eggs, the eggs were not fertilized and turned white. I continued to condition her and the male during this time. On her 3rd batch of eggs it was successfully fertilized. At this point, there aren't as many fry's in the tank. I am thinking that the ones that swam over to the fathers side yesterday and today got eaten. There are about 10 fry's left swimming by the female, hopefully I can raise a few.
I hope this helps you with your project.