I'm thinking of selling a kidney. I figure having 2 of them is redundant.
Seriously... good powerheads to move water and redundant (like the extra kidney) heater. If you're in the WINDY part of S. Alberta, I would consider a power backup for the water pump/powerheads at least. When I lived in Lethbridge, there were times I was the only guy around with lighting during power outages :-)
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