My brother-in-law has Ozarka Spring Water delivered to his house monthly and they always have a couple of 5 gallon bottles left over every month (they are on a flat rate plan). He was wondering if he could use this water for his tank as top-off water and for water changes.

I'm thinking it will be fine since copper is not detectable.

Any other input out there on the subject?
Ozarka® Natural Spring Water — Mineral content analysis:

http://www.ozarkawater.com/KnowH2O/OurSources.aspx

His tank: 34gal RSM reef.

Thank you.