Quote Originally Posted by swamp creek farms
you have any problems this morning ?
None at all. The ambient temp got down to 37F but the little DIY heater kept the water warm enough. The water temp did drop down to 63F at about 7:00am, but that was still 26 degrees above ambient. i could have run the propane higher and kept it warmer, but I was trying to see how long a tank would last. That tank started out almost full (not quite) and it ran 27 hours. Costs was about 67 cents per hour to run it. Definitely not practical cost-wise for long term use, but it kept my fish alive for 2 cold nights. Low is only supposed to be 52 tonight, so the tilapia are on their own. (The tank water will stay 5 or 6 degrees warmer than ambient most of the time and the fish have lived through many 50 degree nights without issues before)