I've been reading alot of posts about bucket heater this and bucket heater that. Here is my set-up on a test bucket. excuse the tie wraps and Litter Bucket. This set-up will cost you less than $50 , and about 30 minutes of your time. Cut about 1ft off female end of extension cord , wire both black wires to thermostat , crimp whites together then crimp greens together. Then fasten thermostat to side of bucket or container ( epoxy, tie wraps or other) below water level . This is very important , the thermostat will not shut-off if it is above the water level. Place bucket heater in container then plug into GfCI outlet. You will have to play with thermostat to get your desired temp since location and bucket materials can effect true inside temp. Bucket Heater from Tractor Supply (stainless steel ) No rust after 6 months in water . $30 110v Lower Thermostat for hot water heater $ 8.57 Home Depot 15' extension cord 14gauge $ 7.97 '' '' You can also use a Heating element used in hot water heaters. about $ 10.00 .