if biggs is where i think it is (up above yuba city) florida lmb and cnbg should do just fine. there is a thermal belt along the east side of the central valley (i call it the toehills) where all types of citrus is grown. it rarely freezes, and when it does it doesnt last long. its probably very rare that a pond would even get ice around the edges let alone freeze over but duckdude could speak to this better than i.
