- Dec 16, 2015
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You can use an aquarium heater just fine. 
If you are worried about it breaking put it into a larger pipe that has some holes in it.
The temperature setting would be not really good though, they are not really very accurate and a too high temperature costs money to run. If you are happy with the cost of electricity, all is well and good.
For about the same cost as the heater itself you can also get a temperature controller with a relay in it to switch the heater on and off accurately. You don't need to open the heater because it will start heating immediately it's switched on. The temperature controller would try to keep the temperature a few degrees above freezing.
	
		
			
		
		
	
				
			If you are worried about it breaking put it into a larger pipe that has some holes in it.
The temperature setting would be not really good though, they are not really very accurate and a too high temperature costs money to run. If you are happy with the cost of electricity, all is well and good.
For about the same cost as the heater itself you can also get a temperature controller with a relay in it to switch the heater on and off accurately. You don't need to open the heater because it will start heating immediately it's switched on. The temperature controller would try to keep the temperature a few degrees above freezing.
 
	 
 
		 
 
		 
			
		
		
		
	
	
			
		 
			
		
		
		
	
	
			
		 
 
		 I made a vertical nipple watering system using a 5 gallon Igloo drink cooler, saddle nipples, a heater in the water and a small reptile waterfall pump to circulate the water through a 3/4" PVC pipe built into the bottom of the nest box with rigid insulation. Worked to about 10F with a stock tank heater in it. To about -10F with an aquarium heater. But the nipples sometimes still froze when it was colder because they are not right up in the pipe.
 I made a vertical nipple watering system using a 5 gallon Igloo drink cooler, saddle nipples, a heater in the water and a small reptile waterfall pump to circulate the water through a 3/4" PVC pipe built into the bottom of the nest box with rigid insulation. Worked to about 10F with a stock tank heater in it. To about -10F with an aquarium heater. But the nipples sometimes still froze when it was colder because they are not right up in the pipe.  
 
		 
 
		 
			
		
		
		
	
	
			
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		