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Maxi
10/17/2009, 10:58 PM
I am finally investing in a RO/DI filter. Hence, the trips to the LFS every week are unnecessary.

Is this a good filter?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=380163561519&ssPageName=ADME:B:EF:US:1123

First one on the top left.

How do I work this thing?

Mike31154
10/17/2009, 11:28 PM
The red text "This DI resin may not generate 0 ppm water, if you need 0 ppm, please check our 0 ppm item " should be a good indication as to the lower quality of this system. I've seen plenty of information regarding the ineffeciency of having the DI cartridge in a horizontal position as well and the unit you are looking at has horizontal DI cartridges. If I read your sig block right you have a nano reef and a unit with 100 gpd membrane is overkill as well as the fact that a 75 gpd membrane will give you a better rejection rate after the RO stage meaning less load on the DI stage.

You will be much better served looking at the systems offered by one of the RC sponsors such as Buckeye Field Supply, Bulk Reef Supply, The FilterGuys etc. More money yes, but in the case of a RODI system, definitely worth it. And these folks will offer plenty of advice on how to work it. Plan to spend between $160 and $200 for a good quality system.

Flipper62
10/18/2009, 12:25 AM
A good RO/DI is one of the best Investments you can buy for a reef tank. However NOT buying the correct one can hurt your tank & be a waste of money.

As said above.....the ad said if you need 0.0 TDS check out our 0.0 TDS item. Right there is a clue that its NOT what you need.

IMO.....Buy a good RO/DI unit from one of the sponsors here on RC. They are really not any more expensive. You get what you pay for. Plus they are here if you need any help.

I have the OceanReef +1 from the FilterGuys...$199.00.

Maxi
10/18/2009, 07:03 AM
Alright, I understand.

How about their 0ppm item?

which is this one...

http://cgi.ebay.com/Reef-Drinking-RO-DI-Tank-Reverse-Osmosis-Filter-System_W0QQitemZ110444847436QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item19b706a14c


I know its overkill for a 26g, but I am not going to have it running 24/7. This tank evaporates almost a gallon of water everday, and I only have 10 a week; and 3 are for water changes.

Maxi
10/18/2009, 07:14 AM
I went on bulk reef supply, and checked out their special.

Which is this:
http://www.bulkreefsupply.com/RO/DI-Filters-&-Systems-RO/DI-Systems/c9_10/p366/Standard-75GDP-RO/DI-5-Stage-System/product_info.html

What would you pick?

Marchingbandjs
10/18/2009, 07:26 AM
I have mine, i got the 0ppm one though, def get that one.. they were running a sale, i got a 6 stage, sed, carbon, ro and 2 DI for 70 free shipping. I love mine, works like a charm... the rejection is about 2:1 but water test PERFECT...

I would get the 0ppm one works great for me, confusing directions but not hard, pm me if you need help.. i love it and it cheap

Marchingbandjs
10/18/2009, 07:27 AM
dont get the holding tank ... unless you are going to connect it to a dispenser on the counter for water..

Randy Holmes-Farley
10/18/2009, 08:12 AM
This article describes what the various parts of an RO/DI do for you, so you know what to look for:

Reverse Osmosis/Deionization Systems to Purify Tap Water for Reef Aquaria
http://reefkeeping.com/issues/2005-05/rhf/index.htm

reef_doug
10/18/2009, 02:17 PM
Maxi... the one in the link is not a very good unit. Cheaper prefilters and the 1/2 size horizontal DI makes it inferior. Possibly an imported membrane too.

I would look at the Spectraupre Maxcap for $250 if you can afford it. Other good ones are Spectrapure ProPlus for $150 or Bulk Reef Supply Economy 4 stg at $130.

http://www.spectrapure.com/email/customer-appreciation.html#1
http://www.bulkreefsupply.com/RO/DI-Filters-&-Systems-RO/DI-Systems/c9_10/index.html

obiwanthegoby
10/18/2009, 02:39 PM
I have the Typhoon III from airwaterice, Had a bit of trouble getting 0ppm when I first got it, source water was 240ppm they sent me out a free bag of DI resin.. and this fixed the problem. (I was new to the hobby and didn't realize I had to change the resin so often yet... It works great though, I use it on my 400 gallon SPS system.

Billybeau1
10/18/2009, 04:13 PM
Maxi, read Randys article to get a good grasp on the knowledge first. It is very informative.

With a 26 gal tank, I would not get a unit where you replace the di resin,

I have a 75 gallon and I replace my di cartridge probably once a year with initial tds water of 140 or so. I make about 25 gallons a week.

Get yourself a nice system up front. You won't be sorry. ;)

Buckeye Hydro
10/19/2009, 06:25 AM
Refillable DI cartridges are no more expensive when new than non-refillable cartridges, and they provide you the option of saving considerable $ when its time to change the DI resin.

Russ