Originally Posted by chachi
what is RO water?
Glad I said it to you then!!!
RO water is a pure form of water that you use in your tank, so you don't get nitrates, phosphates, ect. These things come in you normal drinking water. You can purchase a unit, or you can buy it from the store (wally world, food store) It costs about .40 -$1 a gallon! You can purchase a Ro unit they will range from $100 up in price, but are well worth the price of them!!!! ( If you are getting a tank from your friend check with them to see if they already have the RO unit!!)
Some people even use Distilled water, but alot of people frown on it cause alot of distelled water is made from Copper coils, and if copper gets in the water, and potentialy in your system it can cause some problemes with you tank, inverts, ect.... (if you go that way make sure that they dont use copper coils to make it!)