I have only breed axies but that was all right, even though after they breed i ahd to put the parents in differnt tanks (not together or with the eggs) because the male was eating the feamles tale and then i had the eggs in another tank.
Ianab to confirm you im not sure about" but its 40cm deep. If you have water in a pond/pool i guse, you have to have a fence around it. Because of little kids falling in and drowning.
Good Luck With The Pond
Males start to get bristles at 4cm I think? and thats how you tell if its male or female because I think females get small 1s when there older. Don't count on that being right but it is something like that
Mrs Frog i have breed axies before and it waas awsome watching them grow. But then i did not have enough time to look after them and my tropical tank so sadley they had to go. Good luck with breeding them.