This past fall I prepared the pond for the winter by removing the pump that takes water up to the second level (the filtration pond and the water fall.)
It was a good plan, however we were blessed with some lovely warm weather and the algae grew with abundance and it didn’t take long before I couldn’t see anything but green.
What to do, what to do…. I needed the filter. So back into the pond it went. This filter system is also a fountain and although I could have shut that off and just pump water up to the second pond I decided to leave it running in case the hose to the pond froze. I did, however, aim the fountain water directly into the pond rather than shooting up into the air.
It didn’t take long before water was clear again, maybe three days at the most. That was a surprise, since most of the grasses in the upper pond had died away.
Next came the real winter weather. I bought some water pipe insulation foam and wrapped it around any hose that was exposed to the elements. Most of the water is buried under some dirt, not very deep, but unaccessible unless I tear it all apart.
I added the heater and set it up so that the hot water created was at the intake for the filter. I thought that would help keep the water in the hose from freezing, at least until we hit the sub-zero temperatures.
Well, we have now had our sub-zero temperatures, a week or so of -15C and thereabouts. Every day we’d check to see if we’d have to turn the pump off and every day we watched the water flowing nicely. At the end of the week the water was freezing at the pond and the ice kept building up and up until a giant mountain of ice appeared—but the water still flowed down the waterfall.
The weather is supposed to warm up this week and, hopefully, that ice will thaw and disappear.
What a wonderful surprise it was to see that I could leave the system up right through the winter.
-- - Debbie, SW Ontario Canada (USDA Hardiness Zone: 5a)