which ro water to buy ?

[mike31154]

The difference between distilled and RO water is minimal. They're simply different processes to achieve the same goal, almost pure water. RO forces water through a membrane to strip impurities whereas distilled water is produced by boiling water to create steam, which is then condensed, leaving impurities behind. So it probably boils down to price, RO vs distilled.

I'd have to agree with Kevotron in that an RO unit might be a better option, especially if your signature is current and you're running a 125 gallon tank. That's a fair amount of water to be bringing back from the store. The upfront cost of purchasing an RO system will be amortized relatively quickly. For a few dollars more you can add DI and have even purer water. The downside is the amount of waste water produced and finding creative ways of using that, rather than just sending it down the drain.

Or you could build yourself a still, make your own distilled water and maybe a little 'shine on the side. Just don't allow any law enforcement friends you may have into your house!

Happy New year.