R.O. performence

hangles · 04/14/2006, 06:27 AM

just got one of those units from e-bay and had the water checked. the TDS coming out of my faucet was 320 and the R.O. end is 90 is this good poor ect.?
thanks harold

boxfishpooalot · 04/14/2006, 07:28 AM

i think its supposed to be zero! Tds stand for total dissolved solids after all. Whats dissolved?

RichConley · 04/14/2006, 07:37 AM

Quote:

Originally posted by boxfishpooalot
i think its supposed to be zero! Tds stand for total dissolved solids after all. Whats dissolved?

Wrong. It shouldnt be 0 coming out of his RO. It should be low, but theres no way hes going to get the RO itself down to zero withouth having ridiculous waste ratios.

At 320, try to adjust the waste valve so that your TDS is down in the 20s, or lowe if you can afford to waste more water.

AZDesertRat · 04/14/2006, 08:29 AM

Depending on the membrane you got you should be seeing anywhere from 90 to 98% rejection or removal. So you should be seeing between 6 and 32 out of the membrane. Lower is much better but I doubt with most ebay units you will ever see the 6. E- bay units are cheap for a reason and its that they skimp on quality. Personally I would return it and save up a couple more $$$ and purchase a high quality unit from someone like www.airwaterice.com, www.buckeyefieldsupply.com, www.purelyh2o.com, www.thefilterguys.biz or www.melevsreef.com .
All build units specifically tailored for reef enthusiasts and will turn out the best water you can get. Buckeye is right there in Ohio, if you are like me I try to keep my business local when possible.

smleee · 04/14/2006, 08:38 AM

Do you have an RO or RO/DI unit? Most likely you don't have a Dow FilmTec membrane, but you still should be getting better than 90 tds as said.

eee

RichConley · 04/14/2006, 08:47 AM

I've got an ebay unit, with about 80 TDS tap, and I'm getting 0 out of the RO. You should be down much lower.

Reefugee · 04/14/2006, 08:58 AM

Are you running the carbon filter in the last stage? If you are, remove it. (I made the same mistake before and wondering why my tds was so high.) Also, if you don't have a DI filter, you'll still be in the 20ppm or 30 ppm.

Minh

04/14/2006, 06:27 AM	#1
hangles Registered Member Join Date: Feb 2006 Location: nashport ohio Posts: 948	R.O. performence just got one of those units from e-bay and had the water checked. the TDS coming out of my faucet was 320 and the R.O. end is 90 is this good poor ect.? thanks harold __________________ I like fishy crackers ! Current Tank Info: 75 gal reef/ 55 gal puffer/ 20 gal fowlr/ 10 gal fowlr

04/14/2006, 07:28 AM	#2
boxfishpooalot Registered Member Join Date: Mar 2005 Location: canada, Grande Praire, Ab Posts: 5,824	i think its supposed to be zero! Tds stand for total dissolved solids after all. Whats dissolved? __________________ Its a good idea to have a refrence sample for alk test kits. 1.1350 grams of baking soda in 1gallon of distilled water=10dkh. Check your alkalinity test kit! Algae is Mother Natures phosphate remover Current Tank Info: 220 galon mixed reef.

04/14/2006, 08:29 AM	#4
AZDesertRat Moved On Join Date: Jan 2002 Location: NW Phoenix Posts: 16,621	Depending on the membrane you got you should be seeing anywhere from 90 to 98% rejection or removal. So you should be seeing between 6 and 32 out of the membrane. Lower is much better but I doubt with most ebay units you will ever see the 6. E- bay units are cheap for a reason and its that they skimp on quality. Personally I would return it and save up a couple more $$$ and purchase a high quality unit from someone like www.airwaterice.com, www.buckeyefieldsupply.com, www.purelyh2o.com, www.thefilterguys.biz or www.melevsreef.com . All build units specifically tailored for reef enthusiasts and will turn out the best water you can get. Buckeye is right there in Ohio, if you are like me I try to keep my business local when possible. Last edited by AZDesertRat; 04/14/2006 at 08:44 AM.

04/14/2006, 08:47 AM	#6
RichConley Registered Member Join Date: Sep 2004 Location: Bostonian in Chicago going to DC Posts: 9,908	I've got an ebay unit, with about 80 TDS tap, and I'm getting 0 out of the RO. You should be down much lower. __________________ NO TANKS!!!

04/14/2006, 08:38 AM	#5
smleee Registered Member Join Date: May 2004 Location: Boise, ID Posts: 1,344	Do you have an RO or RO/DI unit? Most likely you don't have a Dow FilmTec membrane, but you still should be getting better than 90 tds as said. eee

04/14/2006, 08:58 AM	#7
Reefugee Registered Member Join Date: Oct 2004 Location: Davis, CA Posts: 6,105	Are you running the carbon filter in the last stage? If you are, remove it. (I made the same mistake before and wondering why my tds was so high.) Also, if you don't have a DI filter, you'll still be in the 20ppm or 30 ppm. Minh