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Old 08-05-2006, 09:40 AM   #1
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RO/DI Units ???

It seems that there are many RO/DI units available for around $100. However there are also plenty of them that are $200 or even $300. Some are 2 stage, 3 stage or 4 stage.

What do you get for the extra $$$ when buying the more expensive units (ouher than GPD output) ?

Is it worth it?

What do you use?

46 gal FOWLR
11lb Live Rock - 40lb Live Sand
ProClear Pro 75 - LR rubble & skimmer in sump
AC 300 HOB
AC 402 Powerhead - AC 301 Powerhead
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Old 08-06-2006, 02:05 AM   #2
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I have one that I bought off of E-bay. I paid $100 a year ago and it works great. I have a 150 gallon that I filled with it and replace evaporated water every other day. I personally would save the money and try one of the cheaper ones. God knows every dollar you can save in this hobby is great.

150 Gallon FOWLR
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Old 08-06-2006, 05:43 AM   #3
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Save money by getting one from eBay. You can get a 5 or 6 stage 100gal/day unit for around $100 shipped.
Steve - DFWMAS
92-gal Corner Bowfront: VHOs,PCs,LR,LS,Sump,Skimmer,Fish,Soft Corals,LPS (Born again 9-04)

29-gal: PCs,LR,LS,Skimmer,Fish,Soft corals (Born 9-04)
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Old 08-06-2006, 11:42 AM   #4
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The number of stages and other bells and whistles will add to price. Things like in-line TDS metters and preasure gages all add up. I recently purchased a system from www.thefilterguys.biz and am very happy with it.
Some people are like slinkies...they serve no real purpose yet can still bring a smile to your face when you push them down the stairs!:p
Have a great day! Brian
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Old 08-06-2006, 10:45 PM   #5
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I bought one off ebay and it was $120. It works so good and my dad is a plumber and hooked it up to a 60 gallon tank to fill it with RO/DI water. So when i get water i put my 5 gallon pale down an fill it up and put it in my fish tank. It's worth buying.
30 gallon with 250w 14k HQI lighting
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Old 08-09-2006, 07:28 PM   #6
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I bought a 100 gpd 6 stage ro/di with a drinking faucet and 4 gallon pressure tank from eBay for $135 shipped. Works great. Fish and inverts love it too. Bought a TDS meter from the same seller for about $12.

First 3 stages are sediment filters, 4th is RO, fifth is DI and 6th is carbon to add a little taste back to the water. Should you decide to go with a DI unit be sure to Google the subject of drinking DI water. There are several schools of thought as to whether it's safe or not.
7 month old 100 gallon. Hopefully on my way to a great reef tank. A few small fish and a few small soft corals. T5 HO Lights and ro/di unit.
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Old 08-10-2006, 09:24 PM   #7
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I got mine from Air, Water and Ice and have been very happy with it. Good unit at a fair price.

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Old 08-11-2006, 08:25 PM   #8
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AWI has great units and great customer service. I have the typhoon 3 and its a great unit. They als sell refurb units at a cheaper price. a 75 GPD unit is all we need and its the most efficient unit with the best rejection rate.
You want a ro/di that has a DI housing that uses cartridges, IMO they are way better then the DIs that lay down across the top of the membrane housing. They ones that are horizontal can get channeling through the resin.

9/02-125 REEF, 125 lbs LR,LS 4x160 VHO, Reef Devil /Sump, Fuge
7/03-55 FOWLR 60lb LR, 50 lb SD sand 2x40 NO strip light, Reef Devil/sump, Fuge

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