Stupid question about RO???

[Eazy222]

OK, I’m having a little trouble wrapping my mind around this RO system business. I understand what it’s for, but… How is it set up in conjunction with the tank? I have a 180g tank, I’ve been looking on several web sites at RO systems. Most of them explain the output of water as XXX GPD (gallons per day). How do I start the tank? I assume I’m over looking something very simple here, and feel pretty stupid about it. If the system only puts out XXX amount of gallons a day, how do I start the tank? Do you just wait a day or 2 to fill it? Do you start the tank with “TAP WATER”, and hook the RO system to your tank? Or do you just spend a ridiculous amount of money buying water that has already gone through the RO process?

HELP ME!

[jenglish]

Most folks run RO into a holding tank or bottle, mix SW in a seperate tank and then add it to the aquarium. SOme folks start a tank with tap to cycle it. Whethor it hurts the tank is debatable.

[Loverotties]

Don't use tap water! Fill it up with water and add salt or do in buckets,plastic storage tank/barrel and add the salt there then add to tank.Which ever you prefer!