RO vs. RODI

[Percula]

It seems that having listened to our LFS we have ended up with some things that will work well enough, but there are better options out there.

Recently, we bought an RO unit. On Saturday we learned from a better LFS that RODI is really the way to go. Thoughts? Opinions?

Many thanks,

Lynda

 

[Rcpilot]

RO/DI is the best way to go IMO. I am running a 6-stage unit that I purchased from Filter Direct. It's the RD-102 6-stage. Requires a pump to boost pressure up to around 60psi.
http://filterdirect.com/product_info.php?cPath=21&products_id=29

1st stage - 5 micron sediment filter
2nd & 3rd stage - coconut shell carbon
4th stage - TFC/TFM 100gpd RO membrane
5th & 6th stage - de-ionize canisters

IMO a good RO/DI unit is the #1 piece of equipment you need in this hobby. Without the RO/DI unit, all the fancy filters and chemicals in the world will do nothing for your reef.

 

[Percula]

Thanks very much for the link. Unfortunately, it looks like they won't ship to Canada. Do you know of anybody who does?

Lynda

 

[Rcpilot]

Oh Canada, eh?

Sorry, I didn't see your location before I posted that.

Try these guys:
Filter Guys Table of Contents Page
Reverse Osmosis

 

[daugherty]

try P U R E W A T E R C L U B

 

[Bifferwine]

An RODI unit is better, and is preferable, but if it was me and I had already bought the RO unit, I probably wouldn't bother buying an RODI. The RO filters will take out 99% of impurities, and the DI is supposed to take care of the last 1%.

What you should really be using to judge whether you should get a new one or not is the TDS (total dissolved solids/salts) reading of your water. You can get a TDS meter cheap off of Ebay (I got mine for $15), and if your TDS is high, you should get a better unit. If it's low, yours is doing its job just fine.

 

[project5k]

speaking of tds meters, i really need to get one, so i was lookn round on ebay, and found this one... whaddya think?

BRAND NEW DIGITAL TDS METER FOR WATER TESTING TDS EZ - eBay (item 300351792440 end time Oct-27-09 13:49:58 PDT)

 

[dcantucson]

That should work fine Project5k. I have one that is very similar.

 

[daugherty]

thats not a bad one at all. i have a duel one that i got from bulkreefsupply that test the water comming into the rodi and water leaving it. i got it for about 26 buck i think

 

[project5k]

what about the calibration fluids.. think i should bother with the 5 bucks just to know for sure its right?

 

[daugherty]

i would get the fluid

 

[project5k]

yea, i guess 5 bucks is pretty cheap to KNOW its right, and not be wondering all the time...

ok,

I'm in...

i just ordered my tds meter and solution and a ph meter and cleaning and storage solutions...

finally, i'm headed towards not having to tell the difference between green and a tiny bit greener!

 

[bjohanson1234]

dont forget about
not quite so green could be yellow better check it under strong sun light

I really hate that color:grumble:

 

[project5k]

yea, thats why i ordered the meters... cause i dont care what color the lcd display is, just so long as i can read the #'s

 

[tankedchemist]

It seems that having listened to our LFS we have ended up with some things that will work well enough, but there are better options out there.

Recently, we bought an RO unit. On Saturday we learned from a better LFS that RODI is really the way to go. Thoughts? Opinions?

Many thanks,

Lynda

What brand RO unit did you get? It is entirely possible to add onto some units, depending how they're configured and built. Show me some specs and I might be able to tell you where you can find the DI canister to put on there.

 

[bjohanson1234]

Or with some ingenious plumbing you can hook up a DI chamber.

 

[daugherty]

bulkreefsupply.com has some really cheap addon di cans