The plumbing of the 5 running tanks and sump was done like this
 
General view
		
		
	
	
		
	
		
	
 
Water flow from out of the sump
		
	
 
entering the lower tank
		
	
 
entering in the central tanks
		
	
		
	
 
and in the top tanks
		
	
		
	
 
Water leaving the top tanks
		
	
 
and leaving central tanks
		
	
		
	
 
entering in the sump
		
	
 
Next time i will try to take better pics
				
			General view
	
	Water flow from out of the sump
	entering the lower tank
	entering in the central tanks
	
	and in the top tanks
	
	Water leaving the top tanks
	and leaving central tanks
	
	entering in the sump
	Next time i will try to take better pics