Getting 120ppm TDS in RO/DI water and wondering if the RO Right is the culprit - anyone verify if theirs is also increasing that much?
BTW - my tap is 54 and distilled 000 so meter is calibrated enough.
Full Version: TDS of RO/DI after adding RO Right?
Of course the RO right is the culprit. According to their website: "KENT MARINE R/O RIGHT is a concentrated dry formulation of dissolved solids and balanced electrolytes that returns the natural water chemistry to reverse osmosis, distilled or de-ionized water." So if you are measuring TDS (total dissolved solids) after adding something that is a dry formulation of dissolved solids it will be higher than zero. Measure TDS of the RO water before you add anything at all
There is no reason to add RO Right to RO/DI water for reef use.
What is you reasoning behind the additive?
What is your RO only TDS and your RO/DI TDS, those numbers along with the tap water reading will tell you the condition of your membrane and DI resin. Prefilters and acrbons do little to nothing for TDS so cannot be tested with a TDS meter but should be changed every 6 months like clockwork and the RO system disinfected at that time to protect the membrane integrity.
What is you reasoning behind the additive?
What is your RO only TDS and your RO/DI TDS, those numbers along with the tap water reading will tell you the condition of your membrane and DI resin. Prefilters and acrbons do little to nothing for TDS so cannot be tested with a TDS meter but should be changed every 6 months like clockwork and the RO system disinfected at that time to protect the membrane integrity.
QUOTE (AZDesertRat @ Feb 21 2010, 03:44 PM) 
There is no reason to add RO Right to RO/DI water for reef use.
What is you reasoning behind the additive?
What is your RO only TDS and your RO/DI TDS, those numbers along with the tap water reading will tell you the condition of your membrane and DI resin. Prefilters and acrbons do little to nothing for TDS so cannot be tested with a TDS meter but should be changed every 6 months like clockwork and the RO system disinfected at that time to protect the membrane integrity.
What is you reasoning behind the additive?
What is your RO only TDS and your RO/DI TDS, those numbers along with the tap water reading will tell you the condition of your membrane and DI resin. Prefilters and acrbons do little to nothing for TDS so cannot be tested with a TDS meter but should be changed every 6 months like clockwork and the RO system disinfected at that time to protect the membrane integrity.
So do you think a LFS will add RO Right into their RO Water when they sell?
QUOTE (thewire @ Feb 22 2010, 03:00 PM)
So do you think a LFS will add RO Right into their RO Water when they sell?
Very un-likely, it does after all cost money
What do most stores sell water for? $0.40/gallon?
It's not my RO water - it's from 2 different LFS that both sell it as ATO or freshwater - one says they add RO-Right and I wondered if that could be the culprit - also it could very well be my water jugs as I might have mixed salt in them several fill ups ago. I have a new bucket of fresh from another LFS I'll test tonight-
this speaks to the issue with buying RO water - you have no control.
this speaks to the issue with buying RO water - you have no control.
QUOTE (bluefunelement @ Feb 22 2010, 04:23 PM)
It's not my RO water - it's from 2 different LFS that both sell it as ATO or freshwater - one says they add RO-Right and I wondered if that could be the culprit - also it could very well be my water jugs as I might have mixed salt in them several fill ups ago. I have a new bucket of fresh from another LFS I'll test tonight-
this speaks to the issue with buying RO water - you have no control.
this speaks to the issue with buying RO water - you have no control.
If you need some fresh sample water, I can bring some to you.
Makes me wonder if they are adding it to cover for poor filtration and high TDS? Sure would be nice to get a sample straight from the RO/DI before it hits storage.
QUOTE (thewire @ Feb 22 2010, 04:42 PM)
If you need some fresh sample water, I can bring some to you.
distilled water measures at 000 - to be honest I am using a hobbyist grade TDS meter but I'm not looking .09 but 120+ whereas distilled is 000 and my tap 55.
I'm assuming you purchased "freshwater" based on what you've said, please correct me if I'm wrong.
Auto top off water should read 0 and be rodi pure.
Freshwater is probably for freshwater fish and has the RO-right. Fresh fishes need the water to be reconstituted. Without added gh shrimp/inverts suffer, without added kh there's ph swings. Sounds like you bought the wrong choice of the two. 120 Tds is about the perfect starting point for fresh, as you can add what your particular species needs after.
If they're adding RO right to the ATO water, or it's testing above 0tds go somewhere else or get your own ROdi unit.
Personally I would not purchase freshwater RO reconstituted from the store for my crystal red shrimp tanks... you really have no idea what is in there. Old filters.. Tap water...
Auto top off water should read 0 and be rodi pure.
Freshwater is probably for freshwater fish and has the RO-right. Fresh fishes need the water to be reconstituted. Without added gh shrimp/inverts suffer, without added kh there's ph swings. Sounds like you bought the wrong choice of the two. 120 Tds is about the perfect starting point for fresh, as you can add what your particular species needs after.
If they're adding RO right to the ATO water, or it's testing above 0tds go somewhere else or get your own ROdi unit.
Personally I would not purchase freshwater RO reconstituted from the store for my crystal red shrimp tanks... you really have no idea what is in there. Old filters.. Tap water...
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