Reef Central Online Community
Blue Zoo Aquatics

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > The Reef Chemistry Forum
Register Blogs FAQ Calendar Mark Forums Read

Notices

User Tag List

Reply
Thread Tools
Old 06/14/2019, 06:38 AM   #1
mike r
Registered Member
 
mike r's Avatar
 
Join Date: Aug 2010
Posts: 57
High tds readings

So after being out of the hobby for 3 years Iím gonna be setting up a fluval sea 13.5. I have a 5 stage ro system with 1 di 10in resin cartridge. All filters were just replaced and flushed. Iím having a issue with my tds after my di cartridge. My incoming tds is 335ppm, after the ro its 13ppm and after my di itís 8ppm.
Now on my old tanks 3 years ago we were on city well water and I was to get zero tds no problem. Now weíre are on Lincoln pipestone rural water. So Iím thinking itís gotta be something in the rural water thatís not being taken out. Anyone else on rural and have to do extra beyond a 5 stage?


Sent from my iPhone using Tapatalk


mike r is offline   Reply With Quote
Old 06/14/2019, 11:53 AM   #2
Uncle99
Crab Free Zone
 
Uncle99's Avatar
 
Join Date: Sep 2017
Location: Ontario, Canada
Posts: 2,463
I get the same reading when the following happens
- the DI cartridge is not sealed perfectly
- the DI resin is exhausting
- you sample from a cup, instead of the bucket


Uncle99 is offline   Reply With Quote
Old 06/14/2019, 05:40 PM   #3
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,910
Is that 8 ppm measure from water straight from the filter? The TDS will rise over time. Also, it's possible that a fair amount of carbon dioxide is getting through the filter. You could try aerating a sample outside for a few hours, and measure the pH change (if any). That'd give some idea of the carbon dioxide content.


__________________
Jonathan Bertoni
bertoni is offline   Reply With Quote
Old 06/14/2019, 05:43 PM   #4
mike r
Registered Member
 
mike r's Avatar
 
Join Date: Aug 2010
Posts: 57
Ya itís right after the di cartridge. I called Brs today again and Iím gonna try a valve after the di cartridge to reduce flow and increase contact time. It does seem to be flowing into my holding tank a lot faster than when I was on city well. Around 35 psi then and 55 psi now


Sent from my iPhone using Tapatalk


mike r is offline   Reply With Quote
Old 06/14/2019, 10:35 PM   #5
bertoni
RC Mod
 
Join Date: Mar 2002
Location: Mountain View, CA, USA
Posts: 87,910
Okay, maybe that will fix it. If not, I'd double-check the measurements and work from there.


__________________
Jonathan Bertoni
bertoni is offline   Reply With Quote
Old 06/14/2019, 10:39 PM   #6
mike r
Registered Member
 
mike r's Avatar
 
Join Date: Aug 2010
Posts: 57
Nope it didnít work. Hmm yes I am testing right after the cartridge. I will try givein it a mixing a shot tomorrow


Sent from my iPhone using Tapatalk


mike r is offline   Reply With Quote
Reply

Thread Tools

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 On

Forum Jump


All times are GMT -6. The time now is 10:34 PM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright ©1999-2014
User Alert System provided by Advanced User Tagging v3.3.0 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.