Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 06-08-2004, 10:45 AM   #1
Aquarium Advice Activist
 
Join Date: Jul 2003
Location: Leesburg, VA
Posts: 168
R/O membrane life expectancy

How long can I expect my 100 gpd R/O membrane to function properly before I need to replace it? I have replaced the 1 micron and carbon pre-filter 4 times so far, and the system runs pretty much 24/7.

Thanks,
Karl
__________________

__________________
karlseith is offline   Reply With Quote
Old 06-08-2004, 11:13 AM   #2
Aquarium Advice Addict
 
Atari's Avatar
 
Join Date: May 2004
Location: UK
Posts: 2,468
It's very difficult to say how long it will last. It depends a lot on your tap water quality. The only thing you can really do is take TDS readings frequently, which most people do anyway.
__________________

__________________
My wife and I were happy for twenty years. Then we met.
- Rodney Dangerfield.


Click HERE to vote for Aquarium Advice!
Atari is offline   Reply With Quote
Old 06-08-2004, 11:18 AM   #3
Aquarium Advice Activist
 
Join Date: Jul 2003
Location: Leesburg, VA
Posts: 168
TDS is GH and KH right?
__________________
karlseith is offline   Reply With Quote
Old 06-08-2004, 11:25 AM   #4
AA Team Emeritus
 
Join Date: May 2002
Location: Virginia
Posts: 2,256
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
Usually you will see your TDS start to climb as well as your total RO output start to fall off. If you have really clean water going in to the membrane then it will last longer.

12-18months seems to be a good average livespan.

TDS stands for Total Disolved Solids. This represents basicly everything that might be in the water aside from the 2 hydrogen and 1 oxygen. Dust will affect your TDS measurement as well as any other impurity.
__________________
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   Reply With Quote
Old 06-08-2004, 11:28 AM   #5
Aquarium Advice Addict
 
Atari's Avatar
 
Join Date: May 2004
Location: UK
Posts: 2,468
If you don't have a TDS meter you should definitely look into it.. they are quite inexpensive and pretty much essential when it comes to any kind of water purification equipment.

I got mine from ebay for under £20 and I'm guessing they will be even cheaper in the states.
__________________
My wife and I were happy for twenty years. Then we met.
- Rodney Dangerfield.


Click HERE to vote for Aquarium Advice!
Atari is offline   Reply With Quote
Old 06-08-2004, 01:31 PM   #6
AA Team Emeritus
 
Join Date: Oct 2002
Location: Chatsworth, GA
Posts: 4,071
Send a message via Yahoo to loganj
I would agree with fishfreek that 1 yr is a good average although there are many factors that apply. One thing you can do to prolong the life of the membrane is to periodically backflush the membrane. This will remove buildup on the outer layer of the membrane. A TDS meter is really the only way to be sure though.
__________________
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
Logan J
loganj is offline   Reply With Quote
Old 06-08-2004, 02:21 PM   #7
Aquarium Advice Freak
 
Join Date: Jan 2004
Location: London UK
Posts: 362
So what kind of TDS reading is consider to be good?
__________________
kwan is offline   Reply With Quote
Old 06-08-2004, 03:19 PM   #8
AA Team Emeritus
 
Join Date: May 2002
Location: Virginia
Posts: 2,256
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
TDS of less than 10 would be good. A TDS less than 5 would be great and anything less than 3 would be excellent. IMHO
__________________
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   Reply With Quote
Old 06-08-2004, 03:43 PM   #9
Aquarium Advice Addict
 
Join Date: Mar 2004
Posts: 5,832
Send a message via Yahoo to quarryshark
Here is a link for some reasonably priced TDS meters.
http://www.freshwatersystems.com
__________________
quarryshark is offline   Reply With Quote
Old 06-08-2004, 03:58 PM   #10
AA Team Emeritus
 
BillyZ's Avatar
 
Join Date: Apr 2003
Location: Western NY
Posts: 4,064
found this handheld one on ebay: http://cgi.ebay.com/ws/eBayISAPI.dll...703139066&rd=1 $20+ after shipping isn't bad at all. I recognize the brand name, Hanna, anyone else have anything by them?
__________________

__________________
Acronyms and Abbreviations
BillyZ is offline   Reply With Quote
Reply

Tags
tan

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
German blue ram life expectancy? Cichlid Discussion 14 02-10-2013 12:19 AM
life expectancy? Erok7620 Saltwater & Reef - Getting Started 11 01-11-2008 01:39 PM
Astra Snail Life Expectancy bladeruner143 Saltwater Fish Only & FOWLR 2 06-30-2006 02:45 AM
*Powerheads? Life Expectancy xxnonamexx Saltwater Reef Aquaria 4 04-23-2005 03:27 PM
What is the life expectancy of a peppermint shrimp? noobtank Saltwater Reef Aquaria 2 12-03-2004 01:05 AM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 06:18 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.