Almost made it through the winter without a hard freeze... Now I'm trying to thaw the 1/4" of ice! Seattle will have temperatures just above freezing during the day for this week.
I purchased some work clamps off Amazon, 3.5 mil clear plastic, 1/2" pvc pipe and made a quick greenhouse for the aquaponics system.
We shall see if the plants can survive a few days like this... 
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You're on the right path. These things work a treat in our slightly milder climate.
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