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					Originally Posted by  banditpowdercoat
					 
				 
				I need to set my tank up for 3 week sustainability.   Sometimes cant trust the hired caretakers 
			
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 So do a water change every three weeks. I have a system setup on my tank similar to what I described earlier but I have to manually activate the pump, this way I can do it whenever I'm available. Takes about 2 minutes to change 10 gallons and I don't have to have premixed water ready prior to this. Best of all the hole system is just a pump on a switch and bucket of salt with a cup 
