Unfortinately mine have never spawned. I had a male and female that was of breeding size but they died from ich. Right now I have four that are still quite small, and when I say small, they are about 3 inches in size. The Acei's I am actually going to attempt to breed since they are of larger size.
When you sasy the Blue ones, do you mean the Johanni's? They are very attractive when they are younger, but when they are older, they are not as pretty. We just sold our Johanni that was about 6 1/2 inches and nice size in girth. But they are very attractive fish.
I am assuming that the tank is 33
gal? At least that's what the AA calculator said. I don't know if I would put that many yellow labs into a 33
gal tank. You may want to look for a 55. Especially for breeding. And if you are wanting to add Johanni's, definately get a 55. I personally wouldn't put African cichlids in anything smaller than a 55
gal. But since you already have the tank, I'd say stick with a species only tank. Don't mix it up.