Pond Boss Forums AERATION Systems questions 8 acre pond at 10,000' - lots of aeration ?s

You said you get lots of wind year round. If that is the case, the lake might stay pretty well mixed in the summer via natural forces.

Are you where you can monitor temperatures at different depths this summer? The reason is that if you can determine you have a thermocline at a certain depth where the water temperature rapidly drops, then maybe aeration might do you some good. But if the wind is mixing the water pretty well, then summer aeration might be of more limited value.

Making the lake bigger and deeper might also help with the winter kill situation.

You could focus on getting the air for winter needs first to keep some open water. Fix the fish kill problem first. Then advance to deeper water diffusers if you still think you need it later.