NIce tank. What are dimensions? What kind of fish? What is the flow rate threw it. Myne is just like yours to the looks of it except myne is plywood.
EG- Theres no need to call me a fool. Im sorry your getting deeply upset because i was right, i didnt mean to offend you. Im pretty sure he could keep a stable temp using heaters. And that all depends on what he wants to keep in there. Ever think about racoons or hawks i wouldnt want a 200 dollar fish getting eaten by one. Bottom line Outdoors is not a smart way to go.