One more thought on it is that they are an invasive species. They are already in your area, but by putting them in your pond you may inadvertently introduce them to other bodies of water through your outflow.
If you read the original thread, I mention they are invasive and to be careful about that, both legally and ethically. However, the pond I stocked them in flows into a creek that already has them... Exactly how am I am going to spread them? Once Asiatic clams are in a watershed, they spread throughout it rather quickly.
