Ro Or Deionized Water From The Store?

[sothoth]

Anyone use DI water from the store? I don't want to get an RO system at home, but I might if needed. I'm mostly concerned about copper. Any reason I can't use your basic alhambra water for my tank?

Thanks!

 

[jeffery]

i used i for a long time befor i got my RO/DI unit and it was just fine