Any chance I might get a pair out of 4 leopard angle fish? I just bought 4 and they're in a 5.5 gallon (temporary) since I just move to a new aprt I'm waiting for the manager to approve the fish. If she dose I'm gonna get my 30 gallon and put them in. When will they mature? Do I have to wait when they mature to tell who's male or female? Picture below
To answer your questions: Angelfish can start breeding at about 8 months old. Until they reach close to that age, sexing them will be sketchy at best. If your fish fit into a 5.5 tank, they will need at least another 6 months or more of growing before they reach 8 months old.
The only guaranteed way of sexing them is by watching who lays eggs and who fertilizes. The ones laying eggs are the females
To answer your first question, let me ask you this, if you have 10 or even 100 fish and they are all the same gender, will you get a pair? Obviously not. How many fish you have does not increase your chances of pairs.
At this point, I'd just enjoy the fish and IF you have both sexes and they pair off, then you can go to the next step.
If you want to better your chances of getting pairs, you should really get larger fish. This will increase your chances of getting opposite sexes as there are some external signs on larger fish that sometimes gives their gender away.
There is a thread under the breeding forum titled "Wigglers at last" which talks all about breeding and raising Angelfish. You might want to read through it to see if you even really want to breed these fish.
As for tank size, I just had a pair of fish pair off in a 30 gal amongst 8 other Angels. Larger tanks are better to give the OTHER fish a chance to get away from pairs but they are not a necessity for growing them up for pairing. I remove pairs to their own tanks as soon as I see them pairing off. And for the record, I use 10 and 15 gal tanks for breeding so a 30 gal for 1 Angel is a bit overboard in my opinion.
Hope this helps
) In this case, size does matter 
