Ro/di Units, Any Difference?

[DAN-O]

i know everybody on this thread raved about air water ice but i have to say their service
sucks. i called them saturday after posting this thread and left a message i wanted to
order a unit. didn't hear from them and called again monday afternoon and got the
answering machine again. left a message and still have not heard from them. if it takes this much effort just to buy a unit, how the hell are you going to get any service
afterwards.

 

[Killerdrgn]

I dunno i just bought my unit online.

 

[Tim]

Tony from Reef Exotic`s carries them :www.reefexotics.com

 

[autoponicz]

i been looking at this ro/di unit from H20 science...
has the dual tds meter and guage...but only 4 stage
i been using a 6 stage one i got from a friend that left the hobby...but will a 4 stage be enough?

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=250113736091&ssPageName=STRK:MEWA:IT&ih=015

 

[vanceny]

Why is that Pierce? Knowing you, I'm sure you're correct,..just curious to the reason..

Why not just order from Buckeye Field Supply? They are a sponsor here.

A 75gpd membrane has a rejection rate of 98% and the 100gpd is 90%.

So for example:

Tap Water = 100 tds
after 75 gpd membrane = 2 tds
or
after 100 gpd membrare = 10 tds

As a result you'll end up burning through more DI resin with a 100 gpd membrane.

 

[Tim]

Tony is also a sponsor and a vendor. He is local and you can pick up youself to save on shipping....

 

[Buckeye Field Supply]

Some characteristics of good RODI's for reefers:


Standard-sized prefilters, membrane, and DI cartridge
Brand name, high-rejection membrane
Specifications provided for each stage
Pressure gauge after the prefilters and before the membrane
Thermometer
DI bypass
Vertical DI stage
Refillable DI cartridge
Aluminum bracket
Quick connect fittings
Flush valve
Clear housings
High-quality instructions
Customer support after your purchase

And no, these characteristics are not available on "all" systems you'll find out there for sale.

Russ