Roland Jacques
Premium Member
TDS what is exceptable water quality? what is your tds when you change your filters? also what about your carbon block?
TDS what is exceptable water quality
- Thread starter Roland Jacques
- Start date
hounddog01
Active member
MY TDS without a Di is 8-10. I beleve anything below 15 is ok. Of course the lower the better.
Roland Jacques
Premium Member
thanks
Roland Jacques
Premium Member
do you guys have dual moniters. if so can you tell me what readings you get after each section .
ie.
tap is 65
after carbon block it goes to 55
after r.o. it is 25
after deion its is 5
im not using a RO this time im going carbon striaght to DI
im trying to determin how big of a carbon section i should use. im trying to maximize flow.
im trying to get a feel of what i can exspect to get out of carbon alone.
ie.
tap is 65
after carbon block it goes to 55
after r.o. it is 25
after deion its is 5
im not using a RO this time im going carbon striaght to DI
im trying to determin how big of a carbon section i should use. im trying to maximize flow.
im trying to get a feel of what i can exspect to get out of carbon alone.
landragon
Premium Member
I wish I had your water 
tap : 300-520
After sediment and carbon : less 30
RO : 8-12 depending on temp
DI : 0
Carbon won't do much to tds. RO ar DI. And carbon>DI will exhaust resin very quickly. Slower with your city water than mine of course, but I would imagine with only 55ppm coming into your RO , only getting 30 taken out seems off. You should be able to manipulate the pressure into it, or get a better membrane if yours is cheaper, to get much lower TDS directly out of it. This would make your water usable, or with the addition of DI , your resin woul dlast a long time.
tap : 300-520
After sediment and carbon : less 30
RO : 8-12 depending on temp
DI : 0
Carbon won't do much to tds. RO ar DI. And carbon>DI will exhaust resin very quickly. Slower with your city water than mine of course, but I would imagine with only 55ppm coming into your RO , only getting 30 taken out seems off. You should be able to manipulate the pressure into it, or get a better membrane if yours is cheaper, to get much lower TDS directly out of it. This would make your water usable, or with the addition of DI , your resin woul dlast a long time.
Roland Jacques
Premium Member
Thanks landragon, just what I need to no.
Buy the number it seems that without your RO section your DI would exhaust 3 xs faster.
I think that ROs are good for people who donââ"šÂ¬Ã¢"žÂ¢t use that much water to extend resins life. But deion resins can be recharged on the cheep. Im looking mainly for economics. I use a lot of water mostly fish only tanks and I want max flow.
i guess the only question left is to find out how many times i can rechcharge DI brfore the quality drops to uneceptable level?
Atlanta has great water the worst thing about our water is the buffers (phosphate) they use.
Buy the number it seems that without your RO section your DI would exhaust 3 xs faster.
I think that ROs are good for people who donââ"šÂ¬Ã¢"žÂ¢t use that much water to extend resins life. But deion resins can be recharged on the cheep. Im looking mainly for economics. I use a lot of water mostly fish only tanks and I want max flow.
i guess the only question left is to find out how many times i can rechcharge DI brfore the quality drops to uneceptable level?
Atlanta has great water the worst thing about our water is the buffers (phosphate) they use.
landragon
Premium Member
Actually, If I went straight DI I get 40 gallons before it is done. With a RO prestage, I get 200-300. So it is a bit better than 3x. I also run my waste water to my lawn and washing machine so as none is truly wasted. And we drink the RO, so I really couldn't do with out. It sounds like for you a large rechargable DI would be best. Did I say LARGE? Basically I feel you should be able to handle a problem if it comes down the line. I would say seperate cation/anion followed by a third Hi S cartridge. Is Atlanta on chloramine? Remember it gets a trip right through RO and is pretty tough on DI resins. There are appropriate resins for the job though.
RobinsonFam1
New member
landragon: you should call the EPA if your tap is over 500. thats a major problem/health risk.
Atlanta or atleast my county( gwinnett) is uzing ozone treated water. my tap is about 20-35 at worst. but like previously said, if i do a po4 test its really high!
Atlanta or atleast my county( gwinnett) is uzing ozone treated water. my tap is about 20-35 at worst. but like previously said, if i do a po4 test its really high!
RichConley
New member
Tap: 35
RO: 0
DI: 5?????? whats going on here? Looks like I need a new DI unit.
I bought it used and the kid had the flow restrictor on the wrong outlet, so I think basically tap was going through the DI.
RO: 0
DI: 5?????? whats going on here? Looks like I need a new DI unit.
I bought it used and the kid had the flow restrictor on the wrong outlet, so I think basically tap was going through the DI.
AZDesertRat
In Memoriam
Tap 627
RO 11
DI 0
A TDS over 500 is not a health risk. Thats pretty common in the West. Mine reaches over 800 at times and never goes under 550 depending on the source water blend at the treatment plant.
RO 11
DI 0
A TDS over 500 is not a health risk. Thats pretty common in the West. Mine reaches over 800 at times and never goes under 550 depending on the source water blend at the treatment plant.
RichConley
New member
The EPA considers 500 as the threshold for unsafe drinking water.
AZDesertRat
In Memoriam
If that were true then most people west of the Mississippi would be dead by now.
That is merely a guideline for untreated water. There is no regulation on TDS.
That is merely a guideline for untreated water. There is no regulation on TDS.
lbear
New member
There is an article in chemistry forum talked about TDS:
http://www.reefkeeping.com/issues/2004-04/rhf/feature/index.php
http://www.reefkeeping.com/issues/2004-04/rhf/feature/index.php
RichConley
New member
The fact that it wont kill you doesnt make it safe.
AZDesertRat
In Memoriam
TDS is merely an astetic problem and not a health risk therefore there is no maximum contaminant level established for it. Yes it is hard water but no it won't harm you.
