Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria

Join Aquarium Advice Today
Closed Thread
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 05-24-2002, 11:58 AM   #1
AA Team Emeritus
Join Date: May 2002
Location: Virginia
Posts: 2,257
Send a message via ICQ to fishfreek Send a message via AIM to fishfreek Send a message via MSN to fishfreek Send a message via Yahoo to fishfreek
RO/DI (Reverse Osmosis - Di Ionizer) Why they make good H2O

How Reverse Osmosis Systems Work

Reverse Osmosis systems purify water by passing it through a series of filters to remove large contaminants and harmful chemicals/pollutants and then by forcing it through a special plastic membrane to remove very small contaminants. In the filtration stage, tap or well water first passes through sediment filters where silt, sediment and particles (like sand and clay) are removed. Water is then forced through a high efficiency carbon block filter where micro-pulverized carbon efficiently adsorbs chlorine, chloramines, pesticides and other harmful organic chemicals and pollutants. The pre-filtered water, now stripped of membrane-damaging particles and chemicals, flows into the RO membrane module where pure water molecules are forced through the RO membrane leaving salts, metals, bacteria, viruses, pyrogens and other impurities to be flushed from the system.

How De-ionization Works
Reverse Osmosis membranes, although very good at removing contaminants, still allow trace amounts to pass through. Nitrates, phosphates and silica are among these substances not fully removed. By further processing RO water through multi-layered, mixed-bed de-ionization cartridges, even those difficult to remove chemicals are reduced to virtually undetectable levels. The De-ionization cartridge contains resin beds of positive ions (cations) and negative ions (anions) which react with contaminants to chemically remove them from the water stream. The result is ultra-pure water that is extremely low in contaminants.

Some common stages used in RO/DI filters

Sediment filters
  • macrofiltration and sediment removal (Dirt)
Active carbon
  • Removes Chloride, color, taste
Osmoses membrane
  • Filters out molecules like ammonia, nitrite, nitrate and countless other items that might still be in the water.
  • Charge molecules

RO/DI filters come in many different configurations. Some are 3 stages, some are 4 stages, and some are 5 stage. I believe I have seen filters with more than 5 stages but I do not feel they merit the extra cost. The additional stages are usually composed of additional carbon or sediment filters of different sizes.

You can get just an RO filter or just a DI filter. Make sure you know what your buying as a DI filter will do nothing in the way of removing the pollutants that?s in your water.

On a final note remember to maintain your RO/DI filter. Follow the manufactures suggested replacement schedule when it comes to the filter cartages. A "dirty" filter is not going to give you any benefit by using it.
Remember dont tap the glass, your fish will think you're an idiot -Anonymous mother

Check out our articles area. 30+ Aquatic articles for your enjoyment
Are you in or around the Shenandoah Valley area? If so click here to join our regional forum.
fishfreek is offline  
Closed Thread

osmosis, ro/di

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Reverse Osmosis (RO) EricL General Hardware/Equipment Discussion 7 07-17-2008 01:33 AM
Reverse Osmosis (RO) itafx Freshwater & Brackish - General Discussion 14 02-22-2007 06:02 PM
Reverse Osmosis -HELP PLEASE netto Saltwater & Reef - Getting Started 13 12-17-2005 11:31 PM
reverse osmosis aqh88 Freshwater & Brackish - General Discussion 11 07-17-2005 03:44 PM
Reverse Osmosis Goldie Saltwater & Reef - Getting Started 9 08-25-2003 12:59 PM

» Photo Contest Winners

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2012 Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 01:19 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.