Now that you will be working on 2 ponds instead of one, use that as a bargaining tool with whoever you buy your tilapia and gamefish chow from. If tilapia and gamefish chow are in the plan for your 7 acre pond as well, come up with your combined budget for both ponds and negotiate a deal with your supplier! I dont know what you do for a living, but you may just have some sort of bargaining tool at your disposal that would be an asset to the fish guy?
If tilapia helped in your algae control this year, it would be hard to give that up, even if gamefish chow would add more biomass. On the other hand, with so many 6" CNBG and BG, it would be a shame to stop feeding them if growing big bluegills was part of your goal. They are just so close to being nice fish, but possibly too many of them for the pond to support naturally.
One last suggestion would be to start with a much slower approach with the 7 acre pond and really make the 4 acre pond something special. Your on the verge of something great with that 4 acre pond, something that will blow your mind with awesomeness, but sharing funds with that 7 acre pond is just going to make 2 slightly above average ponds, rather than one world class pond!
Ok I know, this is really my last suggestion, but why not simply take a more natural approach (virtually free) to start managing the 7 acre pond by manipulating the population to what you want it to be, and then spend funds on it in the next season to enhance what you already started. Basically what i am getting at is you could possibly regret skimping on your first project, once you have already started it. Dont spread yourself thin.
