Older and bigger males breed just fine, the key is to keep them lean, it's all about proportions.
That's what I was trying to get at, maybe it didn't come across as intended. Basically don't fatten them up like you would your girls.
Dont get me wrong though, it's not like a big chunky male won't breed at all... Just they really take their time about doing it. The leaner more flighty ones tend to get down to business much quicker.
1.0 Kingpin
1.0 Pastel Het. Pied Het. Albino
1.1 Calider het. Orange Ghost
0.1 Enchi Pastel
0.1 Mojave
0.1 Orange Ghost
0.1 Het. Albino
0.1 Het. Pied