Can fantail goldfish and plecos live outside?

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Question by Kimberly Luu: Can fantail goldfish and plecos live outside?
I have a 40 gallon tank outside for my aquaponics system, and I was wondering if fantails can live outside. I live in SoCal so it never gets cold enough for the water to frost over or anything, but it does get down to about 40-50 at night during the winter. Are they too sensitive for that kind of water temperature? Also, are plecos okay with that temperature?

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