Culling, it's definitely not for the weak of heart.
It has to be done tho if you want to create a strong line of fish. In nature, with animals that have numerous young at a time, the natural survival rate is only about 1%-3% that make it to breeding adults. That's a whole bunch of youngin's that nature had already planned to get rid of. So if you think about it, if nature allows for 1-3 out of every 100 fish fry to survive and we keep an average of 50%-80% +/- of spawns that range in the hundreds, you have to know going in that there are going to be natural deaths as well as deaths by other reasons. We are now the determining factor where as in nature, other fish would surely be eating these deformed or weaker fish. "Only the strong survive."
I bring this up to show you, first hand, how the genetic lines of today's Angelfish have been so compromised. Deformities ( natural) can happen at any time and so you need to be culling constantly. You are far from over with the culling Sini.
And here's an example of how poorly people are culling their fish. I was at a friend's shop yesterday and saw an adult Angel, from a wholesaler, the size of some of my breeders, with a huge notch in front of it's dorsal fin. It was so obvious that I couldn't keep my eyes off of it. It wasn't an open wound, or an old obvious healed over wound but a "defect" and the fish was kept and grown despite it's having it. To me, that's a careless breeder releasing a fish like that and foolish to have kept it that long. If it had been culled at a younger age and size, the breeder could have spared him/herself the reputation of selling poor quality fish. Stepping down from my soap box but I'm just sayin.
Sorry to hear about the issues Poppa is having and I'm sure his site will be a hit once completed.