DI vs RODI

littlesilvermax · #1 04-03-2007, 04:31 PM

Quote:

Originally Posted by crusty1

Christy,
Using the DI will only remove magnesium and calcium from the water, and the small ro units is meant to only polish the remaining 5-10% that slips past the RO membrane. The RO membrane does so much more than remove Ca and Mg hardness from the water, such as other trace poisonous metals, bacteria, and viruses, etc etc.
You can get a booster pump for your RO which increases your system pressure and production, for about $100.

Get a pump, but it costs more then $100.

List is about $225, but you might be able to get it for around $130 or so.

zulu_principle · #2 04-03-2007, 05:24 PM

If the TDS is zero from your water purification method are you not accomplishing the same thing ? With RO or without ?

Always learning.

Wendell

Veng68 · #3 04-03-2007, 11:04 PM

DI will run out faster wthout the RO......... I had a friend who used the "Tap Water" DI unit.......... withour water (no greater then 17 ppm TDS) was able to get 300 gallons a cartridge.

There are ways to regenerate the DI resins but they involve some harsh chemicals and if your not used to working with them............. I would not go that route.

http://www.reefs.org/library/article/twp_recharge.html

http://www.reefs.org/library/article/g_deutschmann.html

Cheers,
Vic [veng68]

Delphinus · #4 04-04-2007, 02:39 AM

Is it a newer house? I wonder why the pressure is lower. When I moved into my new place I found the water pressure hugely lower, I found out it's because I have a pressure regulator on the main. I ended up bypassing the regulator for my RO/DI and it improved things quite a bit. I should have bypassed it for my outside lines too because I don't have enough to get two of those tsh-tsh-tsh-tsh sprinklers going properly in the summer when it's time to water the lawn.

Anyhow just a thought, could there be a regulator on the water line?

EmilyB · #5 04-04-2007, 04:08 AM

With such a low source TDS I would go the DI route. I actually did that with my first tanks and they were big....used the tap water purifier.

Rippin · #6 04-04-2007, 05:12 AM

Quote:

Originally Posted by zulu_principle

If the TDS is zero from your water purification method are you not accomplishing the same thing ? With RO or without ?

Always learning.

Wendell

TDS does not measure bacteria and viruses. An RO unit will make sure these are cleared from the water as well.

EmilyB · #7 04-04-2007, 06:17 AM

Bacteria and viruses???? Sorry but I need some backup infor for that.

Rippin · #8 04-04-2007, 06:37 AM

Quote:

Originally Posted by EmilyB

Bacteria and viruses???? Sorry but I need some backup infor for that.

Which one? That there is bacteria and viruses in water or that an RO unit filters these out?

Bartman · #9 04-04-2007, 08:36 AM

If you are thinking of going the booster route, Aquasafe's unit is $85 USD, delivered.

http://www.aquasafecanada.com/accesories.htm

christyf5 · #10 04-04-2007, 02:31 PM

Quote:

Originally Posted by Bartman

If you are thinking of going the booster route, Aquasafe's unit is $85 USD, delivered.

http://www.aquasafecanada.com/accesories.htm

Thanks, I think I may well go that route.

As for the bacteria and viruses. I should hope that my tapwater has been treated enough that it doesn't contain any of those. I'm mostly more interested in how available nutrients are for algae fuel.