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			 Yes i have added some LR lately. I know the sound of my crabs/snails hitting the glass and it is way louder then that. My heater is not that loud as well.. Say it was a mantis shrimp or pistol shrimp. Would i see them come out at night? Thanks for the help. 
		
	
		
		
		
		
		
	
		
		
	
	
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