RO/DI Units...

sweatervest13

Active Member
Hi,
I am looking at purchasing a RO/DI unit and I was hoping to get some feedback on some of the units out there.
What do kind of unit is a good quality, fair price one?
What is everyone out there using?
How much money should I be looking at spending?
4 Stage, or 5 Stage??
Any thoughts on the Bulk reef supply ones?
Thank you for any input.
I am currently using RO from Walmarts but Its easy math to figure out that after a year or so an RO/DI unit will pay for its self.
 

meowzer

Moderator
I personally use this unit from airwaterice...$139.95...I have a 225G, 54G, 29G, and 10G....and am setting up another 28G
making water is never an issue...I would recommend it
Compact 75 GPD Reefkeeper RODI
COMPACT (5) Stage R.O.D.I.
Fully featured, small size, fits under most sinks. *Now with clear filter sumps.*
The Compact is a five stage R.O./.D.I (Reverse Osmosis/De-Ionizing) Reefkeeping system using a 75 GPD (Gallons Per Day) FilmTec membrane for truly great water quality and production rates.The Compact uses five stages of filtration and purification:
Stage 1) Heavy duty standard industry size 10 Micron Poly Pro sediment filter.
Stage 2) Genuine Gem coconut 5 Micron carbon block *Acid washed.
Stage 3) Genuine Gem coconut 1 Micron carbon block filter *Acid Washed. This removes the remaining chemicals and chlorine. This filter is rated for 9,000 gallons. It's used to strip any remaining chlorine missed by stage 2.
Stage 4) FilmTec TFC membrane 75 GPD (TW301812-75).
Stage 5) One Mixed bed in-line D.I. cartridge 2.5 X 11" mixed bed D.I..
And our complete high quality installation hardware kit with instructions.
You will get truly awesome quality water and very good production rates. An ASOV (automatic shut off valve), the TW301812-75 FilmTec membrane, lots of carbon, and with practically zero maintenance resulting in zero mineral content and zero TDS.
Reefkeeping requires the reduction / removal of chemicals, Chloramines, bacteria, virus, salts, minerals, and heavy metals from top off and make up water. You need and want zero TDS- Pure chemical / Chloramines free water.

  • Acid washing assures purity and excellent flow rate.** FilmTec provides a three-year limited warranty. Please contact us for more information.
Standard Features: All hardware including your choice of hose, faucet, or SV-6 supply valves. Push-in fittings- eliminating the need for tools, tape, or glue. "Plug and play." Automatic Shut Off Valve. (ASOV)Supply valve, drain saddle, filter wrench, in-line ball valve and 24 feet of 1/4 inch food safe tubing.Detailed instructions. Dimensions:
19" x 16" x 6"
If you wanted to add an RO only valve, a DI bypass assembly and a handheld TDS meter .... check out the Compact III.
 

ofalegend

Member
I have the 5 stage RO/DI plus from Bulk. Get in on a group buy though if you go with them (PM me if you need more info). Good unit, and with the 150GPD water saving upgrade kit, makes more than I could ever possibly need. Granted the upgrade isn't necessary, but it cuts the amount of waste water in half, and I was having serious issues with wasting 4 gallons of water for every 1 gallon of RO/DI water. I still get about a 1 to 1 ratio, but much improved, and I use the waste water for laundry. I've heard good things about airwaterice, too. I'm sure either would be fine.
 
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