Congaken
Valuable Member
RO water is reverse osmosis water...it is a process whereby all minerals and any biologicals are removed so that you are not adding organics/nitrates/phosphates= algae to your tank...DI is distilled water...this is put through a still like whiskey where the steam is cooled and brought back to liquid form with nothing remaining...only pure water...do not get spring of bottled drinking water, it is not the same and has minerals and organics in it...
I think that it depends on the size of your tank as to which to choose...RO costs something to set up, but is free after that...I have a 10 gal nano, so I use DI water that I buy in the store at about a buck a gallon...either way, tap water (even aged) will cause major problems in any reef...go online and look up RO units...they've come down in price since the old days...it may be worth your while...good luck...
I think that it depends on the size of your tank as to which to choose...RO costs something to set up, but is free after that...I have a 10 gal nano, so I use DI water that I buy in the store at about a buck a gallon...either way, tap water (even aged) will cause major problems in any reef...go online and look up RO units...they've come down in price since the old days...it may be worth your while...good luck...
so feel free to disregard and read the other one to which i linked a video in lol 
Somehow , I thought someone was asking and no one was answering...
