Hookedup....Tilapia can also be a great forage for your bass.
It may be late to stock them this year
someone else can advise on that.
But next spring you should consider adding Tilapia.
Tilapia are kind of "3Fer".
#1. Tilapia help with aquatic vegetation.
#2. Tilapia are a great source of food for bass to eat because they are such prolific spawners even in their short life-span. They also help take some pressure off bluegill since the bass have more choices to eat.
#3. Tilapia are great to eat....not just for the bass...but humans like to eat them too!
Tilapia die in the Fall/Winter when the water gets cold (so they never over-populate),
you have to re-stock every year, but there are many things ya have to do every year with a pond...so no biggie.
Read more about Tilapia as a stocker fish at the link below:
http://www.overtonfisheries.com/StockerFish/ForageFish/MozambiqueTilapia/tabid/74/Default.aspx