How long can let saltwater sit?

[smellslikeTUNA]

I filled my tank ~1/2 way up with mixed salt water so that I could mix the other half in preparation for the live and dry rock I am receiving tomorrow. Is it OK to leave the saltwater sitting in the tank with no movement or heat overnight, or should I turn on a powerhead and monitor the temp? (I added my sand so I was thinking that it would also be able to settle out a little even though I will be kicking it up again with the rock tomorrow)

[Cantgrowdidly]

it will be fine at room temp.

[smellslikeTUNA]

it will be fine at room temp.

Thanks, what about water movement?

[rbennett15]

it definitely wouldn't hurt to run a powerhead

[elrey]

I will use a powerhead, but no heater

[thegrun]

You can store saltwater in a sealed container indefinitely without a heater or water movement. You should aerate water that has been stored for a long time for an hour before use. Obviously heat it to your DT water temperature before using.