Ye the endlers are proving to be be prolific little breeders! I just enjoy watching them for hours!
But back to the BN, he has never breed either if the documentation is correct. The day centre had to keep the receipts which lists the purchase of endlers guppys (as they we're originally called) and a plec plus plants tank filter etc. The reason for the documentation being so extensive is due to the clients purchasing the tank etc through the clients fund. Anyways they kept a diary also, unfortunately a lot of it had stuck together as it was kept under the tank. But it showed the set up and cycling then the fish being added etc and other than the original fish being introduced I couldn't find any evidence that additional fish, either in the diary or by receipts, have been added!
So if the data I have is correct the the old boy is 16/17 years old! He's quite a shy old fella as well. The good lady reckons he looks like a Tele-tubby!