I really don't have anything to compare it to, but I just filled my 90gal with RO/DI and its been perfect. I've heard the stories of people using tap water and it just didn't appeal to me.
There is alot of debate about what's the most important part of an aquarium and I would have to say WATER. Without it NO fish or invert will survive. You can run several "add-ons" but without good water none of it will matter.
There is alot of debate about what's the most important part of an aquarium and I would have to say WATER. Without it NO fish or invert will survive. You can run several "add-ons" but without good water none of it will matter.