I added both too at about 10:1 native to HB. The Hybrids grew faster at first but the native standards surpassed them in a couple of years. There are theories that the hybrids will compete for nesting ground with the standards and the offspring resulting from them will be inferior. I found a couple of HBG/BG crosses in my pond but based on their size, these few surviors were likely produced while no predators were present in my pond. The hybrids also have larger mouths which allowing them to eat forage that could by utilized by bass. At this point I don't regret stocking them because they add a bit of diversity and are pretty aggressive but I will not restock them nor do I wish that I stocked more than I did. They are also believed to nibble on swimmers. I believe I have experienced this but luckily they don't have any teeth and the feeling was just erie not painful. There are also theories that they will continue to backcross with natives over many generations and degrade the overall population but in my limited experience, I think this is highly unlikely in a pond with predators.
