Reserve Osmosis System For Salt Water Tank

I am looking into purchasing an ro system for my 92 gallon corner tank, when looking at the items they all mention a certain gpd rate. How do i know how many gallons per day i need, and what is the GPD based on?

keywords:aquarium reserve osmosis,Reserve Osmosis System,salt water tank

Is the RO system going to be constantly pumping water into my tank or only when i turn it on? Also, if anyone has basic information on using these systems at all would you please share it with me? I just learned about the RO process and would like to know as much as possible before purchasing one.

As far as water changes go, how much more convenient is it to have one? Anyone already using one of these things? Im am currently looking into a 3 stage Pur-Flo II. thanks in advance for your help

5MDSC Water Pump
Thermally protected pump with open fan cooled motor with ball bearings. Safe for freshwater or saltwater aquariums. For external use only. It is leak proof and seal-less. Requires oiling every 6 months. It is UL and CSA listed. Size: 8 3/4" x 6" x 6" Head (ft) 0-1050gph 6-900gph 9-840gph 12-750gph 15-660gph 18-540gph 21-420gph 24-shutoff

Water Fall & Biological Filter - Small
Add the beauty of a waterfall and the ammonia-busting power of biological filtration with a Proline Biofalls. This dual waterfall-filter features three different kinds of filtration, along with plenty of room for beneficial bacteria to colonize. A special swirl chamber ensures that water is dispersed evenly over the media to prevent clogging. An extra-wide spillway provides extra aeration, too. Includes all fittings and filter media. Size: Filter is 18" L x 16" W x 13" H. Waterfall width is: 16".

I am pretty sure that RO systems do not pump water into your tank. It is apart from your marine aquarium and just produces water on its' own. You must mix the salt and add it to your tank as you do your water changes. I assume you will be doing about a 25% water change every two weeks. That would figure out to about 23 gallons of RO water every two weeks for the water change, plus whatever you need to top off the tank for evaporation during the two weeks. I would assume that 15 gallons a week would be enough for your application.

Go to
and follow their links to setting up and maintaining a marine aquarium. They have lots of info there and lots of links to saltwater sites. I think there is a site that you could find info on RO with.