At what age does a green terror stop being fertile?

[tonymofo]

At what age does a green terror stop being fertile?

I have a male that is 4 years old. I already have a breeding pair so I was going to try to match this guy with a king kong parrot female.

 

[Toby_H]

I had an old Convict that stopped breeding with his mate and then became sickly and died within 6 months... He was at least 7 years old and had been through a lot...

I highly doubt if your 4 year old GT is sterile, unless he was somehow steriled...

Please think things through before hybridizing your fish... and that's all I'll say on the topic