RO/DI Question ASAP!

IShark · 10/18/2010, 10:16 AM

I was looking to order filters for my RO unit and im wondering could I just order 2 sediment and one carbon filter and leave the DI out or will this not give me a 0 TDS read?

jason2459 · 10/18/2010, 10:19 AM

It will not give you 0 tds.

Sent from my DROIDX using Tapatalk

pluschinatown · 10/18/2010, 10:22 AM

you need the DI to get you 0 TDS

IShark · 10/18/2010, 10:27 AM

I was gonna order some Anion resin 32oz. Is that what i would need to put in the DI cartridge?

lordofthereef · 10/18/2010, 12:15 PM

It really all depends on what is in your water coming in. I don't feel anyone can say with certainty that you will not get 0 TDS water, but there is a higher chance there will be some dissolved solids left in the water than there is of you getting a 0 reading. I say give it a shot. Adding a DI cartridge is easy after the fact anyway.

jason2459 · 10/18/2010, 12:17 PM

With out a DI stage I would be very comfortable saying you will not get 0 TDS out of any well or municipal water supply.

lordofthereef · 10/18/2010, 12:20 PM

Quote:

Originally Posted by jason2459

With out a DI stage I would be very comfortable saying you will not get 0 TDS out of any well or municipal water supply.

FWIW the local Culligan units here produce 0 TDS for a good while after they have been serviced. TDS in is around 200 I assume (this is a store a block from my home so I assume they are on the same water supply). My unit fluctuates about 1-2 before DI. Again, it all depends on what is actually in the water to begin with.

EDIT: Looks like you are in Iowa. As a reference, I'm in Ames

jason2459 · 10/18/2010, 12:26 PM

Not a good weekend for ISU .

ducatimikep · 10/18/2010, 12:44 PM

Test it; That's the only way to know.
I am 66 TDS at the tap.
I am at 0 TDS Post RO stage
(but I still run DI)

lordofthereef · 10/18/2010, 01:04 PM

Quote:

Originally Posted by jason2459

Not a good weekend for ISU .

LOL I wouldn't know (assume you are talking about sports)/ I don't follow that stuff. Fish tanks and VetMed is my life! :P

10/18/2010, 10:16 AM	#1
IShark Registered Member Join Date: Jul 2010 Location: Arlington Texas Posts: 188	RO/DI Question ASAP! I was looking to order filters for my RO unit and im wondering could I just order 2 sediment and one carbon filter and leave the DI out or will this not give me a 0 TDS read?

10/18/2010, 10:19 AM	#2
jason2459 Registered Member Join Date: Jul 2009 Location: Iowa Posts: 9,671	It will not give you 0 tds. Sent from my DROIDX using Tapatalk __________________ rebuild and recovery log: No more red house, you'll have to click on my name and visit my homepage! You can check out my parameters at reeftronics dot net website and look for my username. Current Tank Info: 180g mixed reef w/ a beananimal overflow to a dolomite RRUGF. \| 20g long G. Smithii Mantis Tank

10/18/2010, 12:15 PM	#5
lordofthereef One reef to rule them all Join Date: Sep 2009 Location: Leominster, MA Posts: 5,299	It really all depends on what is in your water coming in. I don't feel anyone can say with certainty that you will not get 0 TDS water, but there is a higher chance there will be some dissolved solids left in the water than there is of you getting a 0 reading. I say give it a shot. Adding a DI cartridge is easy after the fact anyway. __________________ "A dog is the only thing on earth that loves you more than you love yourself" ~ Josh Billings Visit My Home page for current build thread (click my user name and select "Visit LordoftheReef's Homepage" in the drop down menu!

10/18/2010, 12:17 PM	#6
jason2459 Registered Member Join Date: Jul 2009 Location: Iowa Posts: 9,671	With out a DI stage I would be very comfortable saying you will not get 0 TDS out of any well or municipal water supply. __________________ rebuild and recovery log: No more red house, you'll have to click on my name and visit my homepage! You can check out my parameters at reeftronics dot net website and look for my username. Current Tank Info: 180g mixed reef w/ a beananimal overflow to a dolomite RRUGF. \| 20g long G. Smithii Mantis Tank

10/18/2010, 12:26 PM	#8
jason2459 Registered Member Join Date: Jul 2009 Location: Iowa Posts: 9,671	Not a good weekend for ISU . __________________ rebuild and recovery log: No more red house, you'll have to click on my name and visit my homepage! You can check out my parameters at reeftronics dot net website and look for my username. Current Tank Info: 180g mixed reef w/ a beananimal overflow to a dolomite RRUGF. \| 20g long G. Smithii Mantis Tank

10/18/2010, 10:22 AM	#3
pluschinatown Moved On Join Date: Jun 2010 Posts: 69	you need the DI to get you 0 TDS

10/18/2010, 10:27 AM	#4
IShark Registered Member Join Date: Jul 2010 Location: Arlington Texas Posts: 188	I was gonna order some Anion resin 32oz. Is that what i would need to put in the DI cartridge?

10/18/2010, 12:44 PM	#9
ducatimikep Needs Moar Cowbell Join Date: May 2008 Location: Anderson, SC Posts: 263	Test it; That's the only way to know. I am 66 TDS at the tap. I am at 0 TDS Post RO stage (but I still run DI)

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