Pond Boss
(This post regards the dangerously low D.O. levels I found in my pond due to heavy snow cover (3 + ppm.) I couldn't remove due to think ice, and thick opaque ice that resulted in the snow melting. I didn't have the sense to run a shallow diffuser this year but I can assure you I will from now on! )

Today i was happy to find not only all of my perch except one mort seem fine in their floating cages but my larger bluegills in another cage show no morbidity or mortality. I'm thinking this means the rest of the fish in the pond should have made it too?

I'm presently running a 1/2 hp Kasco surface aerator in the center of the pond to keep a hole open about 30 by 20 feet wide. It's close enough to the cages to keep the water open but far enough away as to not have any significant flow into the cages. All snow has been removed. I haven't had a chance to check D.O. levels and temps as I was busy blowing snow off my four ponds all day. My back is killing me! I removed it all, not just in strips!

Anybody have any words of advice, encouragement, caution, etc.? Your thoughts would be appreciated! Should I be worried about superchilling of the water even though the aerator only pulls water up from a few feet? There is an odor downwind of the aerator. Water is clear but the bottom looks black.
Two points, Cecil:

1) At least (Northern) BG & YP aren't terribly susceptible to supercooling, compared with, say, RES.

2) Thanks for sharing your concern. I think I will place a shallow water diffuser in each of my ponds in addition to deep water ones when I add electric aeration in the (near) future, along with valves to partition the air flow between deep & shallow release.
 Originally Posted By: Theo Gallus
Two points, Cecil:

1) At least (Northern) BG & YP aren't terribly susceptible to supercooling, compared with, say, RES.

2) Thanks for sharing your concern. I think I will place a shallow water diffuser in each of my ponds in addition to deep water ones when I add electric aeration in the (near) future, along with valves to partition the air flow between deep & shallow release.


Sounds like a winner to me Theo. Better safe than sorry. Hope your redears make it. Hey my former perch supplier near Marysville, OH (Near Columbus) says he has 12 inches of crusty ice and 14 inches of snow on the ground. Damn!

You know in the back of my mind I knew I should have also run a diffuser in shallow water. What can I say the human mind rationalizes. I got away with it the last three years.
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