This R/O unit vs that R/O unit

R

ROLLIN

fanta fanta, do you want a fanta?
Dec 4, 2001
686
0
0
New Brunswick, Canada
I am planning to get either this filter http://www.petsandponds.com/securestore/c238376p16541164.2.html or this one http://www.petsandponds.com/securestore/c238376p16738892.2.html The only differences are that the cheaper one is 24 gallons per day and the other one is 50, and that one has an extra canister for a deionization cartridge. I wouldn't need 50gpd. I want a unit to remove iron, and it would be the TFC membrane that would remove it, right? I think the deionization cartridge is only in there to catch any particles missed at the end of the water going through the unit. So basically what I am asking is, will the cheaper one do what I want it to? I could always add another canister later for the deionization cartridge if I needed it.


Edited to add: I think if the cheaper one will do, I might order it today or tomorrow. Have to count my pennies first though and see if I have enough.
 
Last edited:
If all you want is RO (which is more common for fw use anyways), check out the first unit at the top of this page:
http://www.thefilterguys.biz/ro_systems.htm
It's a bit cheaper and has 1 extra stage prior to the membrane for an additional carbon block (for better chlorine / chloramine and organics removal). It's a higher GPD, but trust me, no matter how little water you think you need on a daily or weekly basis, waiting for a slower GPD unit isn't fun.

EDIT: Sorry... just saw that price on the site you posted and your location is Canada. Not sure of the conversion anymore, but it may or may not be cheaper, especially after shipping.
 
Thanks. Buying things in american money/prices isn't that expensive right now after you convert it to canadian dollars (at least it wasn't a month or two ago). So the main thing I want to know is, will the one I posted for $139.99 filter out ferrous iron? How about the ones in your link? Filtering out iron is my only reason for needing one in the first place.
 
It is the RO membrane that removes the iron, so either unit would be fine. A quick search on the internet showed that a TFC membrane will remove up to 98 - 99% of the iron.
 
That's good then. Hopefully this will solve my problem. I am excited to order it now.
 
fsn77 said:
A quick search on the internet showed that a TFC membrane will remove up to 98 - 99% of the iron.
Click to expand...


I've searched for it on google and couldn't find anything that says a reverse osmosis unit will remove ferrous iron. The only thing I have found that says it will do it are water softening systems.
 
Thanks. In one of those links it says that to use a TFC membrane you water must have a only a maximum of 0.1mg/l of iron.... mine has more. Does that mean I can't use one then?

Here is a quote from watertiger.net "To use a CTA or TFC membrane, the feed water must be microbiologically safe with the following limits:

Iron - 0.1 mg/l, Manganese - 0.05 mg/l, Hydrogen Sulfide - 0 mg/l, Tannins - 0 mg/l"
 
How high is the iron content of your water?
There seems to be a great inconsistency in what the maximum iron concentration should be for a TFC membrane. I've seen sites that say 0.1 mg/L, 0.3 mg/L, 0.5 mg/L, and even 1.0 mg/L. Perhaps the variance is related to the actual manufacturer of the particular TFC membrane being used in the different units. With such a lack of agreement, it would probably be best to contact the seller(s) of the particular unit(s) you're interested in to find out what the recommended max iron concentration is for the unit they are selling. I know from experience that if you e-mailed TheFilterGuys they'll help you as much as possilbe and are a couple of nice guys on top of being very knowledgable (the link I posted previously for that RO unit).
 
On my iron test kit I think it reads about 0.25mg/l for free iron and 0.1mg/l for chelated iron. However, I read that to have rust spots on your laundry (which I get from time to time), that it has to be at least 0.3mg/l. So it must be at least that. You can never really tell on a test kit when the different readings are just different shades of the same color.
 
You must log in or register to reply here.
AquariaCentral.com
Top Bottom