Originally Posted by bootz
you dont have to discount normal tap water. sometime people have a good tap. i have used tap water for about a year now, but i have a really water with no metals or crappy things in it. + i tested it before i put it in my tank to make sure it was not essential to get a RO
unit. additionally, i dont have algae problems my tank is clean.
Not meaning to discount it. As long as you test the tap for all the things that could be harmful to the system it wouldn't be a problem at all. However, most people getting started in this hobby don't know what things might be harmful. For that reason alone, I would recommend to anyone new (like me) to use RO
. That is about as close to pure as you can get. Then, you have control over what you put in the water. Just my opinion.