RO Water Questions

[Noob]

Just a couple noob questions.

Does RO water go bad?
How long can RO Water it be stored?
When stored does it have to have a tight screw cap seal or can it just be in a 5gal bucket with a lid?
Where are the best places in town to buy it (i don't own a refractometer), preferably the NW/W side of town?

Also can can store bought premixed saltwater be stored also?

[SABOB]

RO water can be stored with a lid indefinitely.Mine is in a 33gallon Brute garbage can with a regular lid. Saltwater would benefit from circulating for a few hours before using after storing


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