For a one acre pond without supplemental feeding, you’ll generally want to add about 500 bluegill, depending on what combination of fish are going in there. Non-predator neighbors like catfish and minnows can be placed alongside bluegill in even smaller size ponds, but be wary because they do need a minimum amount of space to thrive. If you prefer a higher density of fish, you will need to establish a feeding program as well as add an aerator to manage additional waste products.
The actual cost per bluegill will depend on local economics, the size/maturity of the fish, as well as whether you’re purchasing them as part of a combination package. You’ll usually see small bluegill (2”- 4”) priced independently in the range of $0.85 - $1.00, usually with a minimum purchase requirement. For the bluegill alone, then, you’ll be looking at a starting point of $425-$500 for a 1 acre pond. Larger bluegill (6”- 8”) are going to set you back by $3.50 - $4.00 per fish. It’s always a good idea to speak to a pond professional, whether that’s your fish hatchery representative or someone from your county extension agency about the best stocking strategy for your region and according to your overall fishing goals.