when i drip my snails i do it for around three hours or more but i try to replace 300% of the water in the bag with both snails and shrimp 
maybe try dripping for a longer period of time see if that helps 
		
	
		
		
		
		
			
				__________________ 
				150 mixed reef  14 fish 4 shrimp 50+ snails 
55 sump long spine urchin  20 snails 
Shawn
			 
		
		
		
		
	
		
		
	
	
	 |