I bought a 5 stage RO/DI system from BRS about 2 months ago. I finally got a TDS meter and is reading the water produced at 3ppm. Is this an acceptable range for a reef tank or should it be 0?
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Water source is city water at 167ppmYes, you want zero after DI.
What is your source water TDS, and post RO?
Also, where does your water come from...well or city water?
At first glance, looks like you need to replace DI resin.
Wow, thanks for the great info! Really appreciate it.So you start and stop your unit say, four time a week.
This will help save your DI resin.....a tee valve to run the first five minutes to waste before sending it to your DI resin. Let me explain...Every time you start your unit you get breakthrough TDS. For me, it shoots up to 50 or 60 or so, and then comes down. I can see this because I have an in-line TDS meter between my membrane and DI resin. Now I also have a tee valve there too! Here's the kind of tee valve I'm talking about:
BRS sells these HERE. Again, this is installed between the membrane and DI resin. When you first turn on your unit, turn the valve so that water goes to waste. For me it takes about five minutes before the breakthrough TDS comes down. Then turn the valve to start to make "good" water by sending it through the DI resin.
This will greatly extend the life of your DI resin. Mine lasts me about a year. Hope this helps.
Aside from DI possibility of depletion, TDS creep could factor in initial start up.
I flushed the water for 5 mins before heading to DI resin and replaced DI resin and I am now getting 0 TDS readings on my water. Thanks again for all your help!So you start and stop your unit say, four time a week.
This will help save your DI resin.....a tee valve to run the first five minutes to waste before sending it to your DI resin. Let me explain...Every time you start your unit you get breakthrough TDS. For me, it shoots up to 50 or 60 or so, and then comes down. I can see this because I have an in-line TDS meter between my membrane and DI resin. Now I also have a tee valve there too! Here's the kind of tee valve I'm talking about:
BRS sells these HERE. Again, this is installed between the membrane and DI resin. When you first turn on your unit, turn the valve so that water goes to waste. For me it takes about five minutes before the breakthrough TDS comes down. Then turn the valve to start to make "good" water by sending it through the DI resin.
This will greatly extend the life of your DI resin. Mine lasts me about a year. Hope this helps.
calculation as follows:My barracuda gets 5-6 tds before hitting the DI. This normal? My city water is at 150-160 tds.
I do get 0 tds after DI though