I'm about to replumb my system to have one sump for both my display tank and my frag tank. I'll be using my display tank sump for this so I will need to drain and move my sump. I have a ~1800 GPH closed loop on the display tank that will continue to run during the move. If I throw a heater in the tank how long can my tank go without the sump? I would think a long time, but wanted to get some opinions. I'm thinking the maximum amount of time it would be down is 24 hours.