Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > General Hardware/Equipment Discussion
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 02-05-2013, 12:20 AM   #1
Aquarium Advice Freak
 
Ice Man's Avatar
 
Join Date: Oct 2011
Posts: 264
RO problem

What can cause sudden TDS spike right after turning on the water? Inline TDS meter is showing increase up to 250 TDS. It goes down after a minute, but never to the same level. Every day average TDS reading is increasing. Right now it is at 70 TDS. Already replaced 3 membranes, ASOV and flow restrictor. Every time it works fine for a month and then TDS reading starts increasing.
Tap water TDS is around 750. Purified water TDS was around 20 with new membrane and only after one month of use it jumped to 70. Any ideas what can be wrong with RO system?
__________________

__________________
Solution to pollution is dilution.
Ice Man is offline   Reply With Quote
Old 02-05-2013, 03:58 AM   #2
Aquarium Advice FINatic
 
pcdebb's Avatar
 
Join Date: Jun 2012
Location: Brandon, FL
Posts: 682
from what I understand, the TDS reading will have a high reading when you first run it, then it goes down. Mine does this and I called BRS and they told me this is normal. Is this what you are seeing?
__________________

__________________
My name is Deb and I have MTS
pcdebb is offline   Reply With Quote
Old 02-05-2013, 12:32 PM   #3
Aquarium Advice Freak
 
Ice Man's Avatar
 
Join Date: Oct 2011
Posts: 264
This is exactly what happens! But every time it happens TDS never go down to the same low number. So right now after it spikes TDS only goes down to 70.
__________________
Solution to pollution is dilution.
Ice Man is offline   Reply With Quote
Old 02-05-2013, 02:19 PM   #4
Aquarium Advice FINatic
 
pcdebb's Avatar
 
Join Date: Jun 2012
Location: Brandon, FL
Posts: 682
I think there is a problem here then. I have "in" and "out" and my out always goes down to like 3 (again, they said normal). 70 is too high IMO.

I also thought that the membrane is the one that rarely gets replaced. Have you tried replacing the cheaper filters? try replacing the sediment or carbon. if you have DI resin, what does that look like?
__________________
My name is Deb and I have MTS
pcdebb is offline   Reply With Quote
Old 02-05-2013, 03:32 PM   #5
Aquarium Advice Addict
 
Mrc8858's Avatar
 
Join Date: Sep 2011
Location: USA
Posts: 5,834
Are you flushing your membrane periodically? You may be getting some build up on it which would explain why after each use the starting TDS is higher each time.
__________________
Mrc8858 is offline   Reply With Quote
Old 02-05-2013, 05:47 PM   #6
Aquarium Advice Freak
 
Ice Man's Avatar
 
Join Date: Oct 2011
Posts: 264
Quote:
Originally Posted by Mrc8858 View Post
Are you flushing your membrane periodically? You may be getting some build up on it which would explain why after each use the starting TDS is higher each time.
Membrane gets flushed once a week for at least 15-20 minutes. I don't use more than 15 gallons of water per week. I also noticed that system sometimes dumps water into drain line even when when I don't use it.
__________________
Solution to pollution is dilution.
Ice Man is offline   Reply With Quote
Old 02-05-2013, 05:55 PM   #7
Aquarium Advice Freak
 
Ice Man's Avatar
 
Join Date: Oct 2011
Posts: 264
Quote:
Originally Posted by pcdebb View Post
I think there is a problem here then. I have "in" and "out" and my out always goes down to like 3 (again, they said normal). 70 is too high IMO.

I also thought that the membrane is the one that rarely gets replaced. Have you tried replacing the cheaper filters? try replacing the sediment or carbon. if you have DI resin, what does that look like?
I replaced all filters, sediment and two carbon, last time I replaced a membrane, about 3 months ago. Sediment filter is still clean because I only use around 15 gallons of water a week. DI filter got depleted very quickly, producing no more than 80 gallons of water.
Yesterday I removed and reinstalled the membrane. It helped for a while producing 20 TDS water but today TDS is all the way to 90.
I am frustrated!!!
__________________
Solution to pollution is dilution.
Ice Man is offline   Reply With Quote
Old 02-05-2013, 06:10 PM   #8
Aquarium Advice Addict
 
Mrc8858's Avatar
 
Join Date: Sep 2011
Location: USA
Posts: 5,834
You may have a pressure issue it sounds like. Do you have a psi gauge?
__________________
Mrc8858 is offline   Reply With Quote
Old 02-05-2013, 08:55 PM   #9
Aquarium Advice Freak
 
Ice Man's Avatar
 
Join Date: Oct 2011
Posts: 264
Quote:
Originally Posted by Mrc8858 View Post
You may have a pressure issue it sounds like. Do you have a psi gauge?
Pressure is at 55psi
__________________
Solution to pollution is dilution.
Ice Man is offline   Reply With Quote
Old 02-05-2013, 08:57 PM   #10
Aquarium Advice Addict
 
Mrc8858's Avatar
 
Join Date: Sep 2011
Location: USA
Posts: 5,834
That's a little low but not enough that it should be causing it to under perform that much imo. I'm stumped... Maybe your tap TDS is just so high that it has to work that much harder to purify it.
__________________

__________________
Mrc8858 is offline   Reply With Quote
Reply

Tags
problem

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








» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 06:32 AM.


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