Yes, it appears that i have a multi-aged class of BG. The Bass that I caught on Saturday was right in line with the relative weight charts. The tilapia have diminished somewhat as I don't see them as often or in as great a number as in the past at the feeder, but i do consistently see about 8-10. I have not replinished the tilipia since 2005. I have a pump next to the tank (pond for our northern friends)that keeps the level topped off and I think that it keeps the water alittle warmer as well.