A couple places I fish have undergone some odd looking issues happening. I've noticed them getting quite a bit more scummy as the days wear on and lately I see large "patches" of scum rising up from the bottom. In just a week's time, the ponds have gone from a few patches of scum, to be almost completely covered. I can't imagine the ponds are turning over already as we are still frequently hitting 80's and some 90's temperature days, with night's going only into the high 60's, if that, plus the water is very clear. 

Either way I've noticed the fishing getting VERY bad in ponds this is occurring in. You can't hardly buy a bite anymore, not to mention the scum starts to limit your lure selection.

Anyone familiar with this scenario - and any tips on how to get a bite when this happens?

Is there any water movement at all? Sometimes static water will cause scum and algae to grow uncontrollably 

FA dieoff as it gets colder.... those ponds may be in the beginning of a fishkill

Nature does control the fish population. I have heard from the ice fishermen about them seeing the ice over full of bass. We finally have a slot limit in ct. We need to remove some of the smaller bass and leave the bigger bass to breed. I'm not fond of removing bass.

Yea there's basically no water movement so the static water may be what is causing it. I hope we're not having a fish kill, there's some good fishing in these ponds and it seems to have a good balance in its population. I can't imagine it's getting cold enough to kill them off, our water temps haven't even yet dropped below 70F yet.

I've fished ponds completely covered in algae and still caught fish, so I don't think it necessarily means a fish kill

In one pond with the surface vegetation and algae I put my biggest treble hook lure on and spend the trip clearing a three foot wide path through the vegetation. I call it shotgun alley.  Now I can fish that one path. It's one of those smaller places to fish.