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Old 04-26-2003, 01:52 PM   #1
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Need help picking an RO unit

Ok I know the ultimate way to go is using an RO/DI unit but I have questions. I'm way new on this subject.

What is the difference between RO & RO/DI? I read the DI is mainly just to give an extra polish to the water, if so then I don't see it as a must have.

I want it for the tank & my husband want's it for the drinking water....can't we use it for both?

We don't want anything too expensive...over say $300. We have a 55 gal tank plus the gallon or 2 we'd consume a day. What size unit would we need. 50 GPD, 100 GPD ?

Whats the difference between 3 RO, 4 RO/DI & 7 RO/DI stage RO's ?

How long would the cartridges last before they'd need replacing? I'd do a 5 or 10 gal water change a week on my 55 gal tank.

I saw different types of connections, isn't the kitchen tap the easiest?

What temp water can you run through it, just cold??

Anything else you can tell me....
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Old 04-26-2003, 03:13 PM   #2
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Ok I guess we'll call premuim aquatics to place our order. I've learned you can't drink DI water, what the difference in stages is & more.
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Old 04-26-2003, 03:25 PM   #3
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check out www.purewaterplanet.com lots of useful info. i got a 100gal a day unit with a di and the storage container for the drinking water for around 200. with shipping. was a good buy for me we love the water the coffee is great my mom comes over and gets water and the fish are swimming happy. ...lor
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Old 04-26-2003, 04:20 PM   #4
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thanks for the link I'll check it out.
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Old 04-26-2003, 05:14 PM   #5
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I found some interesting info for you:

How Deionization Works
Reverse Osmosis membranes, although very good at removing contaminants, still allow trace amounts to pass through. Nitrates, phosphates and silica are among these substances not fully removed. By further processing RO water through multi-layered, mixed-bed de-ionization cartridges, even those difficult to remove chemicals are reduced to virtually undetectable levels. The De-ionization cartridge contains resin beds of positive ions (cations) and negative ions (anions) which react with contaminants to chemically remove them from the water stream. The result is ultra-pure water that is extremely low in contaminants. This unit will reject up to 99% of salts and impurities.
This system can be installed to any fresh water source for your aquarium and drinking water.

Most drinking water at your local grocerie store, like Crystal and Zephyrhills, etc.. have drinking water that is RO/DI.. You may have also, seen the water machines outside of the grocery store. These can also be RO/DI as well. IT is ok to drink RO/DI water..
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Old 04-26-2003, 05:24 PM   #6
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IMHO RO/DI water is the best drinking water out there. A ton better than those bottled water products in the stores even.

Take a look at this link

http://www.aquariumadvice.com/viewtopic.php?t=2476

There is a discount voucher posted that expries at the end of April. They have a few that are under $200

The more stages you have the different membranes its running thru. A classic 3 stage filter might have a Carbon filter, a sediment filter and the RO membrane. A 4 stage might add a DI membrane on to the 3 stage unit. A 5 stage might add a second sediment filter or a second carbon fiter.

RO membranes will last depending on your usage. I got my unit back in Oct 2001 and I got about 1 1/2 years out of it. A replacment membrane should run you about $70 for a 50GPD and $85 for 100GPD.
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Old 04-26-2003, 05:32 PM   #7
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Thanks for the info timbo & fish freek. Then why do people say the RO/DI water tastes funny & that it'll dehydrate you?
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Old 04-26-2003, 05:38 PM   #8
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Cause they are used to water acutally having a taste.

RO water is as pure as your gonna get. High quality RO water has no taste and no real smell.

We also have a wonderful bit of investigative reporting done on RO/DI water in our articles section. Here is a link:

http://www.aquariumadvice.com/showqu...q=2&fldAuto=25

ENJOY
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Old 04-26-2003, 05:45 PM   #9
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wow good link
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Old 04-27-2003, 11:33 AM   #10
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You might want to investigate a few differnet vendors. I looked around, checked Ebay and ended up getting the Typhoon III from airwaterice. I am quite happy with this unit. A TDS meter is included.
They also have a dual Home/reef system.
http://airwaterice.com/Reefkeeper%20Home%20Page.htm
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