One other thing to consider. What if a hand full of contamination fish other than the stocked fish got in the pond at some point?
Say for example a few GSF or a few BG or a few of each. Then even if the F1's did not produce successful F2's, there could still be lots of recruitment from the contamination fish or the contamination fish crossing with F1's.
Unwanted fish getting into ponds unannounced has been known to happen.
Last edited by snrub; 06/19/17 01:14 PM.
