How long will reserved saltwater last?

[elchopo]

New to saltwater tanks. I purchased an established tank that a LFS maintained for a local church. Now it's mine and I transported 95% of the water and have everything set up. I went to the LFS to buy already made saltwater to fill the tank. However, I did not use all of it. I have 5 or so gallons left in a standard storage container with a lid.

My question is how long would this be considered "good" for? I am not sure if certain things from the container could ruin the saltwater over time or what.

 

[Just Jared]

That would be determined by what salt being used and the manner in which it’s stored. Randy and Ryan from BRS have a good video on YouTube with details on this subject.