D/I cart

[Billy]

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

[kim gross]

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]

"Billy" > wrote in message ...
> 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]

"Pszemol" > wrote in message
...
> "Billy" > wrote in message
> ...
>> 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]

"Billy" > wrote in message ...
> "Pszemol" > wrote in message
> ...
>> "Billy" > wrote in message
>> ...
>>> 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]

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
> ...
>
>> "Pszemol" > wrote in message
>> ...
>>
>>> "Billy" > wrote in message
>>> ...
>>>
>>>> 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]

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


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
...
: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
:
: