Ro/do i?

MeTaLMaN1375 · 05/01/2012, 12:18 PM

ok just wanted to know something I just purchased a used RO unit from someone and when I asked him if he had a DI unit to go with it he looked at me as if he didnt even know what that was honestly I dont think he did he said to me that I dont need that and showed me his 220 custom built tank that he built himself and the setup he has going on under his tank and OMG is was like looking at something on a space shuttle sweet setup fully automated I mean he doesnt have to do anything to his tank. but he has no DI unit just RO units so my question is are DI units really needed Im sure they help but are they really needed?

BTW this guy has tons of coral beautiful fish and sweet anenomes I mean everything in his tank including his water looks immaculate.

f3honda4me · 05/01/2012, 12:23 PM

He probably has a GFO reactor too.

You don't need DI, unless you like to be algae free, or use GFO to get rid of all the phosphate.

OR if his water is of high quality, and he gets < 10 ppm after RO, then he wouldn't need the DI. That could be the case too.

My best guess anyways.

Playa-1 · 05/01/2012, 12:30 PM

Di is especially beneficial in a situation where your local water company is treating with Chloramine.

http://reefkeeping.com/issues/2004-0...ture/index.php
http://www.reefkeeping.com/issues/2003-11/rhf/feature/

If my local water company wasn't using Chloramine then I would likely just run the RO unit with a good set of Carbon filters. The DI is a good idea though, as there are other contaminants in the water that are not necessarily pulled out by the RO membrane.

ReeferBill · 05/01/2012, 12:32 PM

RO/DI manufacturers recommend DI's for water that has chloramines added by the Water Department ,call them to see if they add any......

Palting · 05/01/2012, 12:51 PM

You are all making me think twice about my RODI unit now. TDS after my RO unit is 1, and after the DI unit is 0. So, are you all saying I don't need a DI filter? I can just get rid of it?

MeTaLMaN1375 · 05/01/2012, 12:54 PM

ok stupid question is chloramine and chlorine the same thing?

Maaka · 05/01/2012, 01:03 PM

Quote:

Originally Posted by MeTaLMaN1375

ok stupid question is chloramine and chlorine the same thing?

No they are not the same thing. You usually need and di unit or a special filter in a ro system to remove chloramine. but only a small percent of the water supply is treated with chloramines. just call your water provider and ask they will tell you.

Maaka · 05/01/2012, 01:06 PM

Quote:

Originally Posted by Palting

You are all making me think twice about my RODI unit now. TDS after my RO unit is 1, and after the DI unit is 0. So, are you all saying I don't need a DI filter? I can just get rid of it?

It all just depends on how paranoid you want to get on it. Say that 1 is something that you really don't want in you tank, or it could just be something harmless. But if your TDS is 1 after ro you probably are not going through DI resin that quick (or i would imagine) so why just not do it just so you have the peace of mind that the water is absolutely pure.

Some people thing 1 TDS is good. Others will not allow anything over 0 TDS to enter their tanks.

Playa-1 · 05/01/2012, 01:09 PM

Chloramine is much harder to remove from the water then Chlorine. I used to live in an area that had 7 tds coming out of the tap. The TDS reading doesn't concern me nearly as much as the possible Chemicals and pesticide residuals that may make it thru the filters. As far as which filter is right for you, I think it all depends on your situation. Everybody's source water is not the same and so the filters necessary to get the job done may not be the same either.

MeTaLMaN1375 · 05/01/2012, 01:23 PM

ok so I asked my water company and no they do not treat the water with Chloramine just chlorine and my ro unit should do just fine with chlorine.

05/01/2012, 12:18 PM	#1
MeTaLMaN1375 Registered Member Join Date: Mar 2012 Location: Charlotte, NC Posts: 229	Ro/do i? ok just wanted to know something I just purchased a used RO unit from someone and when I asked him if he had a DI unit to go with it he looked at me as if he didnt even know what that was honestly I dont think he did he said to me that I dont need that and showed me his 220 custom built tank that he built himself and the setup he has going on under his tank and OMG is was like looking at something on a space shuttle sweet setup fully automated I mean he doesnt have to do anything to his tank. but he has no DI unit just RO units so my question is are DI units really needed Im sure they help but are they really needed? BTW this guy has tons of coral beautiful fish and sweet anenomes I mean everything in his tank including his water looks immaculate.

05/01/2012, 12:32 PM	#4
ReeferBill Registered Member Join Date: Dec 2010 Posts: 1,906	RO/DI manufacturers recommend DI's for water that has chloramines added by the Water Department ,call them to see if they add any...... __________________ I never realized I had to be a Chemist and a Marine Biologist to maintain a Reef Aquarium!

05/01/2012, 12:51 PM	#5
Palting Registered Member Join Date: Apr 2010 Location: Ohio Posts: 6,912	You are all making me think twice about my RODI unit now. TDS after my RO unit is 1, and after the DI unit is 0. So, are you all saying I don't need a DI filter? I can just get rid of it? __________________ Anything I post is just an opinion. One of many in this hobby. Believe and follow at your own risk of rapid and complete annihilation of all life in your tank :) Current Tank Info: Incept 3/2010, 150 RR, 50g sump, 20g fuge, 150w 15K MH x3, T5 actinics x8, moonlight LED x6, 1400gph return, Koralia 1400 x4, 300 g skimmer, 4 tangs, 2 mandarins, 2 perc, 6 line, 3 cardinals, 2 firefish, SPS, LPS, zoas, palys, shrooms, clam

05/01/2012, 12:23 PM	#2
f3honda4me Registered Member Join Date: Dec 2011 Location: Wisconsin Posts: 1,218	He probably has a GFO reactor too. You don't need DI, unless you like to be algae free, or use GFO to get rid of all the phosphate. OR if his water is of high quality, and he gets < 10 ppm after RO, then he wouldn't need the DI. That could be the case too. My best guess anyways.

05/01/2012, 12:30 PM	#3
Playa-1 Moved On Join Date: Jun 2007 Location: Laguna Niguel, CA Posts: 7,497	Di is especially beneficial in a situation where your local water company is treating with Chloramine. http://reefkeeping.com/issues/2004-0...ture/index.php http://www.reefkeeping.com/issues/2003-11/rhf/feature/ If my local water company wasn't using Chloramine then I would likely just run the RO unit with a good set of Carbon filters. The DI is a good idea though, as there are other contaminants in the water that are not necessarily pulled out by the RO membrane.

05/01/2012, 12:54 PM	#6
MeTaLMaN1375 Registered Member Join Date: Mar 2012 Location: Charlotte, NC Posts: 229	ok stupid question is chloramine and chlorine the same thing?

05/01/2012, 01:09 PM	#9
Playa-1 Moved On Join Date: Jun 2007 Location: Laguna Niguel, CA Posts: 7,497	Chloramine is much harder to remove from the water then Chlorine. I used to live in an area that had 7 tds coming out of the tap. The TDS reading doesn't concern me nearly as much as the possible Chemicals and pesticide residuals that may make it thru the filters. As far as which filter is right for you, I think it all depends on your situation. Everybody's source water is not the same and so the filters necessary to get the job done may not be the same either.

05/01/2012, 01:23 PM	#10
MeTaLMaN1375 Registered Member Join Date: Mar 2012 Location: Charlotte, NC Posts: 229	ok so I asked my water company and no they do not treat the water with Chloramine just chlorine and my ro unit should do just fine with chlorine.