I am upgrading to a new 120G from a 60g cube. I have a lot going on so I was going to just add a little water at a time like 10g a day. I already have the rock and sand (I use the trash bag method to prevent cloudiness) in the tank. As soon as I get it 1/2 to 3/4 full I plan to put some rock from my existing tank in and start up my vortech 40 for movement. When it is full I will obviously start up the mag 12. So the question is: Is it ok to leave saltwater sitting in a tank with no movement for a week or so? Thanks.