Originally Posted by anamilasti
ok ive been using tap water, i want 2 use RO water what do i need to know before i buy a unit, and also is culligan water the same stuff? the unit my LFS has is made by coralife and makes 60 gallons a day (120$)
RO/DI is the way to go, this way you will remove all impurites from your water prior to putting it into your tank. Phophates, Nitrates, Disolved impurities etc, etc Culligan is just Filtered water i think, Not even Revoerse Osmosis or Deionized, do a search and type in ro/di units you will get all the info you need and places to get it as well.