Question about RO/DI

[blackbarracuda]

I have a quick question... say I got a 5 gallon bucket of RO/DI water and left it in the bucket covered, how long could I keep it like that? thanks

 

[reefreak29]

about a week. just keep the lid on when di water is exposed to air it becomes slightly acidic from corbon dioxide in the air

 

[blackbarracuda]

ok thanks a lot