Pond Boss Forums AERATION Should I aerate? Partial aeration?

Given my recent fish kill I'm seriously considering some sort of aeration solution. This is the third time I've considered this since I built the pond. My real issue is that given the size it's not cost effective to aerate the entire BOW. And based on what I've read here and on other sites it appears that partial aeration is a controversial topic, with some experts indicating it can do more harm than good.

Here's the facts on the BOW in question.

Irregular shaped, 7+ acre BOW. Average depth 14+ feet, deepest point almost 30 feet at full pool. Issues with weed control due to phosphorous and nitrogen runoff from neighboring ag fields.

Goal for the BOW is 'balance' if there is such a thing.

Current fish are LMB, BG, RES, BCP, CC and until the last week or so HSB. I'd surmise that most if not all of the HSB were killed due to a large influx of water from the recent deluge - probable cause of mortality is rapid turnover of the pond due to major temperature change from the rainwater. Other possible causes and/or contributing factors could also be rapid die off of vegetation, again due to rapid temp change.

It would be cost prohibitive to completely aerate, so the question at hand is, would this situation have occurred (or something worse occurred prior to this) if partial aeration was in place, likely in the deep water areas near the levee?