View Full Version : ro water

12-08-2002, 04:57 PM
I am purchasing an RO/DI unit for my reefs and would also like to use the RO water with my cichlids. I read in a book that you need to mix 25% tap water with the RO water. Is this true? Also is there a healthier alternative to this such as adding some kind of mineral supliment? Thanks for the help.