Last year we never got this cold, the bubbler did just fine. It just managed to get a little ice on it (in looking again, I think the tube into the water iced over and started shifting, made the diffuser move and float) and floated up to the surface. I sank it again yesterday, tied to a huge rock, it is doing fantastic, big hole in the big pond ice, small hole in the lotus tub ice. The first year of the pond (only 4 fish in it unknown to me any survive the ph death) it froze down 8 inches, deer where walking on it! That was a cold winter.
The lotus are below the ice, the tubers are about 16 inches deep, I also have rosey reds in there. If the lotus tubers froze they would die.
I went down to check pipes etc yesterday, could see those fish swimming around under the ice. There is a hole in the ice, I sent some air over there from the aerator. One of the small preforms is frozen pretty deep it has some small rosey reds, saw them swimming around under the ice also.
The deck pond fish are spending the winter in the house, nice and toasty. The deck ponds don't appear to have swollen or causing any issues. We built them with landscape timbers glued and nailed together. There is plenty of room for the ice to expand up. The spoiled in the house deck pond shubunkins, will go out into the new 1000 pond come spring. My plan right now, is to keep it a all shubunkin pond. I still need to set up the water input and water fall back into the big pond. Have to cut lines past the pump, put in a T and run some lines, put in a ball valve to control the water flow into the shubunkin pond. Next year it will need to be kept unfrozen for the fish, probably another T in the aerator line.
I am thinking of building a skippy type filter to place before the flow into the shubunkin pond, as the water going into it will be unfiltered from the big pond. I have 3 55 gallon barrels, one already piped and ready to go. Just need to change the filter material. I set it up to get rid of the fine debris from the pea gravel when we first built the pond. But also need to figure out how to plant it so it is not an obvious big white barrel sitting down there. Might dig it in some, run the bottom line way out to be able to drain it. The slope helps with this. Waterfall from the barrel into the tank.
The 1000 gallon tank has all of the pond lilies in it for the winter, they had even started to grow new leaves, which are now frozen in the ice. The water appears to be frozen down at least 4 inches, maybe deeper.
Once we get past this cold we pop back up to the 40's - 50's I am going to start to work on it. It will take some time
The bog is frozen solid.