[linuxguru]

If I made 55 gallons of RO/DI water, how long could I keep it in a 55 gal rubbermaid drum before it is unuseable in my tank? Is their a limit as to how long one can store RO/DI water in an unsealed plastic container?

[Samper]

I don't keep mine more than 2 weeks and it's in a sealed opaque container. It may be good longer than that since there is no smell or anything but I don't chance it.

[charlie]

I think as long as the container you are keeping it in is a food grade container, I don't see a problem. I turnover 60-75 gallons a week, so I don't usually even think about how long it is gonna be stored.
HTH

[kevinpo]

As long as you have a lid for the container it should last years

Regards,
Kevin

[Samper]

That's good to know for sure. Thanks Kevin

[Reefland]

It's important to make sure your using a food-grade Rubbermaid container as well:

Originally Posted by Ninong

This question has come up in the past and the answer is "yes, some Rubbermaid containers do leach chemicals into the water." And that is according to Rubbermaid. Rubbermaid says you should only use the ones that meet USDA Meat & Poultry Equipment specs. In the case of the popular Brute containers, that would be the Gray, White and Yellow ones.

[zhenya]

Originally Posted by kevinpo

As long as you have a lid for the container it should last years

I couldn't agree more. I use a 45g container that I bought from one of our sponsors specifically designed for this but it is not necessary. As long as you have a lid on it and it not getting contaminated you should be able to use it for years to come.