Here is info I got from J and L where I bought my Hanna Checker 
Hanna is replacing the reagent directly. Please contact them at:  edge@hannacan.com with the following info:
 
- Your Complete address. 
- Lot number of your bad reagent 
- Quantities that you need replaced.
 
*You do not have to send them the defective reagent.  
		
	
		
		
		
		
			
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				Setup: 180G DT, 105G Refuge (approx. 300lbs LR, 150lbs Aragonite) 
Hardware: Super Reef Octopus SSS-3000, Tunze ATO, Mag 18 return, 3x MP40W, 2X Koralia 4's Wavemaker 
Lighting: 5ft Hamilton Belize Sun (2x250W MH, Blue LEDs) Vertex Calcium Reactor 2x Deltec Pellet Reactors
			 
		
		
		
		
	
		
		
	
	
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