RO vs RO/DI higher TDS with DI???

Post Reply

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
ReefBones Members Profile Send Private Message Find Members Posts Add to Buddy List Guest Joined: January 14 2006 Location: Magna, Utah Status: Offline Points: 2617	Post Options Post Reply Quote ReefBones Report Post Thanks(0) Quote Reply Topic: RO vs RO/DI higher TDS with DI??? Posted: November 29 2007 at 7:39pm
	OK I spent the last hour or so playing with my RO/DI unit. come to find out that the water coming from the RO is 004 ppm now keep in mind this is Magna water where the tap TDS is over 900 ppm and I tested using 2 different TDS meters .. but coming out of NEW DI resin (about 30 to 40 gallons old) its 022ppm .. Whats the deal with that? .. I have always pushed DI water .. but after testing the DI water is higher in TDS than just RO ... curious to see if anyone has found the same results.
	140 gallon Reef 65 gallon Reef 55 gallon Aggressive www.thesalttank.com 801-865-6074 "encourage other divers and sea enthusiasts to take nothing but pictures and leave nothing but bubbles"

cl2ysta1 Members Profile Send Private Message Find Members Posts Add to Buddy List Guest Joined: October 02 2007 Location: Cedar City, UT Status: Offline Points: 4203	Post Options Post Reply Quote cl2ysta1 Report Post Thanks(0) Quote Reply Posted: November 29 2007 at 7:58pm
	no mine comes out 0. perhaps a filter is bad? i know you said its new. or maybe crappy DI resin? or maybe the pressure is going through too quickly. you might need to back it off
	I <3 Boxers Achilles tang lover

ReefBones Members Profile Send Private Message Find Members Posts Add to Buddy List Guest Joined: January 14 2006 Location: Magna, Utah Status: Offline Points: 2617	Post Options Post Reply Quote ReefBones Report Post Thanks(0) Quote Reply Posted: November 29 2007 at 8:02pm
	Well .. I tested my tap water again ... for the first time since the water softener was removed .. its 380 HUGE drop from over 900 .. so thats all good and all .. but it still dose not answer the question as to why the DI water is higher in TDS than just plain RO water ... Cl2ysta1, I tought about that as well .. but I was running it threw 2 DI chambers ... what are the odds that I got 2 bad ones? ...
	140 gallon Reef 65 gallon Reef 55 gallon Aggressive www.thesalttank.com 801-865-6074 "encourage other divers and sea enthusiasts to take nothing but pictures and leave nothing but bubbles"

BobC63 Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: January 17 2007 Location: Lehi, UT Status: Offline Points: 8973	Post Options Post Reply Quote BobC63 Report Post Thanks(0) Quote Reply Posted: November 29 2007 at 8:19pm
	Steve: You're not running anything after the DI - like a "carbon filter", are you? (My unit came with one dead-last inline; the carbon itself would raise the TDS back from a "zero" reading...)
	- My Current Tank: 65g Starfire (sitting empty for 2+ years) - * Marine & Reef tanks since 1977 *

ReefBones Members Profile Send Private Message Find Members Posts Add to Buddy List Guest Joined: January 14 2006 Location: Magna, Utah Status: Offline Points: 2617	Post Options Post Reply Quote ReefBones Report Post Thanks(0) Quote Reply Posted: November 29 2007 at 8:30pm
	Nope straight from the RO threw the DI chambers and to the tanks and fresh water water holding tank. well now its going threw the RO straight to the tanks and fresh water holding tank. I just calculated how much DI resin I have bought the past year ... 29.99 x 12 = 359.88 totally wasted .. (not including tax) ... Edited by thebutler4 - November 29 2007 at 11:44pm
	140 gallon Reef 65 gallon Reef 55 gallon Aggressive www.thesalttank.com 801-865-6074 "encourage other divers and sea enthusiasts to take nothing but pictures and leave nothing but bubbles"

trunks Members Profile Send Private Message Find Members Posts Add to Buddy List Guest Joined: June 10 2007 Location: Holladay Status: Offline Points: 204	Post Options Post Reply Quote trunks Report Post Thanks(0) Quote Reply Posted: November 29 2007 at 10:51pm
	My understanding is that once your DI resin is saturated, it will actually put TDS back into the water.

chk4tix Members Profile Send Private Message Find Members Posts Add to Buddy List Guest Joined: April 06 2007 Location: Texas Status: Offline Points: 4320	Post Options Post Reply Quote chk4tix Report Post Thanks(0) Quote Reply Posted: November 29 2007 at 11:28pm
	Thats strange, I too live in magna and my RO/DI was comming out at 50ppm so I changed my DI resin a week or two ago and I am back down do oo1. Maybe you have some bad media? either way that is strange
	Original Crappy Reef Club Member #2

Post Reply
Tweet

Forum Jump

Forum Permissions View Drop Down

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum