[tang daddy]

If you're using store bought Ro water then why not just use the same store bought water on initial set up and waterchanges, at that point you may aswell install an Rodi, the cost if top up water is mostlikely $5 a week or say half that your looking at $260 a year or $130 if half, kinda doesn't make sense why you would risk a reef tank crashing over a couple hundred dollars being saved.... IMO and not trying to be a jerk or come off like a donkey it just doesn't make sense....

In Vancouver were lucky we don't have to use softeners because our water is very soft to begin with, but I guess in Edmonton and las Vegas it's a must....