Quote Originally Posted by Rocko View Post
Now correct me if I am wrong here, but I'm pretty sure you're supposed to build back the mineral content in RO water through the use of various salts if you plan on using it for anything other than cleaning, otherwise your animals run the same risks as drinking distilled water.
I've never added anything to my RO, but I would not dispute the possibility that some mineral addition may be beneficial. My guess is that there are lots of aquarium products that will fit the bill. Again...as long as they don't end up creating hard to clean water spots on my glass I am a happy camper...so design against splash. It is not as easy as it sounds.