Tonight is the first night I've had to turn my pump on to avoid freeze damage. It has only been running about 20 minutes every 3-4 days, since I'm only running it when adding bleach at this point. When I turned it on tonight, the water didn't move and I thought I might have waited too long, because the water didn't move! Finally, after several minutes of near panic, I decided to switch the filter to recirculate and the water is moving fine when bypassing the filter. Is this normal? Should I expect to have to bypass the filter in sub-freezing temps when I'm only running the pump to prevent ice damage? I guess I'll put it back on filter tomorrow during the day to see what happens. It's supposed to be in the upper 50's.
