If my friend is available during my water change, he'll take 20 gallons, the other 20 gallons goes into the toilet. 
 
It would be perfect to use for a mixed or softy tank water change, but I'm not about to run another system. 
 
So I'm with you on finding a good solution for my waste water. 
 
Maybe find a neighbour and get him hooked on the hobby so I can give away my water.   
 
Mangroves would be awesome though! 
		
	
		
		
		
		
		
	
		
		
	
	
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