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Billy

Joined: 16 Aug 2007
Posts: 210

Posted: Sat Sep 17, 2005 8:59 pm Post subject: D/I cart

I have a 100gpd RO\DI unit (purchased from Marc) and less than 2 months ago I replaced the cartridges. The previous set lasted nearly six months, and my usage has not increased very much in that time. However, the DI unit is already fully discolored, indicating exaustion. What could be causing the DI cart to be exausted so quickly? -- billy Archived from group: rec>aquaria>marine>reefs

kim gross

Joined: 16 Aug 2007
Posts: 22

Posted: Mon Sep 19, 2005 12:28 am Post subject: Re: D/I cart

Billy wrote: > I have a 100gpd RO\DI unit (purchased from Marc) and less than 2 > months ago I replaced the cartridges. The previous set lasted nearly > six months, and my usage has not increased very much in that time. > However, the DI unit is already fully discolored, indicating > exaustion. What could be causing the DI cart to be exausted so > quickly? > It has to be one of two things. Either your membrane is bad allowing a lot more bad stuff through, or your source water is much worse causing more bad stuff to go through. The first thing I would suggest you do is make sure all of the filters are correctly seated (including the membrane if you opened it up. Then check the alk of the water going into the unit, and the alk of the water coming out of the membrane. The water on the outlet should be much much lower than the water going in, if it is not your membrane is not working correctly. Kim

Pszemol

Joined: 16 Aug 2007
Posts: 643

Posted: Tue Sep 20, 2005 5:53 pm Post subject: Re: D/I cart

"Billy" wrote in message @comcast.com... > I have a 100gpd RO\DI unit (purchased from Marc) and less than 2 > months ago I replaced the cartridges. The previous set lasted nearly > six months, and my usage has not increased very much in that time. > However, the DI unit is already fully discolored, indicating > exaustion. What could be causing the DI cart to be exausted so > quickly? Have you solved your problem ? I am very interested what was the reason... What has Marc told to you ?

Billy

Joined: 16 Aug 2007
Posts: 210

Posted: Wed Sep 21, 2005 1:40 am Post subject: Re: D/I cart

"Pszemol" wrote in message @poczta.onet.pl... > "Billy" wrote in message > @comcast.com... >> I have a 100gpd RO\DI unit (purchased from Marc) and less than 2 >> months ago I replaced the cartridges. The previous set lasted >> nearly six months, and my usage has not increased very much in >> that time. However, the DI unit is already fully discolored, >> indicating exaustion. What could be causing the DI cart to be >> exausted so quickly? > > Have you solved your problem ? > I am very interested what was the reason... > What has Marc told to you ? I haven't bugged Marc yet. I've been working some heavy hours, and haven't had time to examine Kim's suggestion yet. b

Pszemol

Joined: 16 Aug 2007
Posts: 643

Posted: Fri Sep 23, 2005 4:20 pm Post subject: Re: D/I cart

"Billy" wrote in message @comcast.com... > "Pszemol" wrote in message > @poczta.onet.pl... >> "Billy" wrote in message >> @comcast.com... >>> I have a 100gpd RO\DI unit (purchased from Marc) and less than 2 >>> months ago I replaced the cartridges. The previous set lasted >>> nearly six months, and my usage has not increased very much in >>> that time. However, the DI unit is already fully discolored, >>> indicating exaustion. What could be causing the DI cart to be >>> exausted so quickly? >> >> Have you solved your problem ? >> I am very interested what was the reason... >> What has Marc told to you ? > > I haven't bugged Marc yet. I've been working some heavy hours, and > haven't had time to examine Kim's suggestion yet. Have you figured it yet ? Just curious...

Marc Levenson

Joined: 16 Aug 2007
Posts: 667

Posted: Thu Sep 29, 2005 4:26 am Post subject: Re: D/I cart

I just saw this thread. Have you tested the TDS of the water going in, the water coming out of the RO and the water coming out of the DI yet? My own DI cartridge looks only half consumed, but it isn't pulling out the last of the TDS like the previous cartridge. Still, the TDS is around 7 and I don't worry about it until it hits 10. At that point I change all my filters out. Marc Pszemol wrote: > "Billy" wrote in message > @comcast.com... > >> "Pszemol" wrote in message >> @poczta.onet.pl... >> >>> "Billy" wrote in message >>> @comcast.com... >>> >>>> I have a 100gpd RO\DI unit (purchased from Marc) and less than 2 >>>> months ago I replaced the cartridges. The previous set lasted nearly >>>> six months, and my usage has not increased very much in that time. >>>> However, the DI unit is already fully discolored, indicating >>>> exaustion. What could be causing the DI cart to be exausted so quickly? >>> >>> >>> Have you solved your problem ? >>> I am very interested what was the reason... >>> What has Marc told to you ? >> >> >> I haven't bugged Marc yet. I've been working some heavy hours, and >> haven't had time to examine Kim's suggestion yet. > > > Have you figured it yet ? Just curious... -- Personal Page: http://www.sparklingfloorservice.com/oanda/index.html Business Page: http://www.sparklingfloorservice.com Marine Hobbyist: http://www.melevsreef.com

Boomer

Joined: 16 Aug 2007
Posts: 20

Posted: Thu Sep 29, 2005 3:20 pm Post subject: Re: D/I cart

There are a number of reasons as to why a DI can come depleted quickly. Just one example is high input CO2. Rather than me running off at the mouth take a read at this; Reverse Osmosis/Deionization Systems to Purify Tap Water for Reef Aquaria http://www.reefkeeping.com/issues/2005-05/rhf/index.php -- Boomer Want to talk chemistry ? The Reef Chemistry Forum http://www.reefcentral.com/vbulletin/index.php WCWing@nospamChartermi.Net Former US Army Bomb Technician (EOD) Member; IABTI, NATEODA, WEODF, ISEE & IPS If You See Me Running You Better Catch-Up "Billy" wrote in message @comcast.com... :I have a 100gpd RO\DI unit (purchased from Marc) and less than 2 : months ago I replaced the cartridges. The previous set lasted nearly : six months, and my usage has not increased very much in that time. : However, the DI unit is already fully discolored, indicating : exaustion. What could be causing the DI cart to be exausted so : quickly? : : -- : billy : :

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