I have been involved with aquaponics for over 2 years here. I have 6 half barrel beds and 1 IBC top as a bed all gravel. Full IBC fish tank and 2/3 IBC sump where the pump is. Temps are no problem here just had to put a roof over it to keep out over 13 feet of rain. Raising Blue Tilapia and tomatoes, okra, cucumbers,eggplant greens and garlic grass.
Looking forward to reading a more US based forum. We plan to return to Kentucky soon and build a greenhouse for a system for ourselves and maybe sell some vegies too. I have helped others build systems here and hope to do the same there. My favorite pastime.
Hope I can contribute my 2 cents here when I think I can help.