In Southern California the weather is generally warm. In the winter we do get some cool days now and then (40's) and even snow believe it or not, but this is a seldom occurance and only happens about once every ten years.. Reading moster fish board it was suggested that plywood is a pretty good insulator as it does not transfer heat / cold very well. I should have no problem keeping the tank temp warm. Further, with the 2 x 4 outer frame, insulating it should be easy. If anything, I may need to cool it when we get those hot summer days.Originally Posted by badflash
A private lake called Corona is near by. They stock talapia and catfish this time of year and a hybrid trout during the winter months.