Yesterday evening I fished a pond that I've fished a few times this summer. It's a large pond and it is fed by a creek and, according to the owner, a couple of springs. The deepest water is near 30 feet. The water is usually fairly clear, but yesterday it was murky, almost to the point of being muddy. There hasn't been a big rain to speak of, in over a month. Usually, the fishing is great at this pond for size and numbers. Needless to say, the murky water slowed the fishing drastically. I was wondering how it became so muddy. Could this muddy/murky water be a result of the pond turning over? We have had some really cool nights in the upper 40s and lower 50s over the past couple of weeks though the days have been mostly 70s with an occasional 60+ thrown in. I thought the air temperatures would need to be cooler than that to make a 30 foot deep pond turnover, but I'm not an expert on turnover. Any ideas?