News — RO Water
RO/DI Water - What Is It and Why Do I Need It?
![RO/DI Water - What Is It and Why Do I Need It?](http://www.asap-aquarium.com/cdn/shop/articles/roplumbing1_{width}x.jpg?v=1453046541)
You probably have come across the term RO/DI water or RO water many times during your readings on saltwater or live coral reef aquariums and wondered "What is RO/DI water and do I need it?" The short answer is this, RO/DI water is highly filtered freshwater, and yes you do need it for your marine and reef aquariums, especially if you make your own salt water.... (READ MORE).