If im not mistaken silver gar are north American fish, most of the fish people here have been suggesting are from tropical waters. Gar are also predators, so small fish in general would not be a good idea. I really dislike when people mix fish from different regions together.... fish have very specific water requirements, and can live quite a long time when properly cared for, I have some that are over 10 years old and thriving.
Just realized origional post is from beginning of the year... hate when old stuff gets dug up!