benifits of adding DI resin to your Ro unit?

Discussion in 'General Reef Topics' started by libog2fish, Oct 11, 2011.

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  1. libog2fish

    libog2fish Fire Shrimp

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    :confused:So I'm currently not running any DI into my closed system...
    What are the main benifits of having/running DI into the system instead of just the 4 stage RO unit...
     
    libog2fish, Oct 11, 2011
    libog2fish, Oct 11, 2011
    #1

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  2. fishboyt

    fishboyt Bristle Worm

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    DI takes out the remaining total dissolved solids (TDS) the RO misses, which are the nutrients algae feed off of.
     
    fishboyt, Oct 11, 2011
    fishboyt, Oct 11, 2011
    #2
  3. AZDesertRat

    AZDesertRat Giant Squid

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    RO by itself is only 90 to 98% efficient. DI is what gets the remaining contaminants out for 0 TDS or pure water.
     
    AZDesertRat, Oct 11, 2011
    AZDesertRat, Oct 11, 2011
    #3
  4. vegastyle

    vegastyle Astrea Snail

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    Love the color changing resin !
     
    vegastyle, Oct 12, 2011
    vegastyle, Oct 12, 2011
    #4
  5. AZDesertRat

    AZDesertRat Giant Squid

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    Color changing resin is a very poor indicator of resin condition. It can change in streaks, in layers, all at once, not at all, top to bottom, bottom to top etc. And its usaualy too late when it does turn colors and you have been passing weakly ionized substancesin to your treated water.
    This is bad because weakly ionized substances are released even BEFORE DI resin is completely exhausted and a few of these include phosphates, nitrates and silicates.

    A handheld TDS meter is by far your best friend.
     
    AZDesertRat, Oct 12, 2011
    AZDesertRat, Oct 12, 2011
    #5
  6. Squinty

    Squinty Astrea Snail

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    AZ, would you agree that it has some real value or Spectrapure wouldn't sell it"?

    Sent from my PC36100 using Tapatalk
     
    Squinty, Oct 12, 2011
    Squinty, Oct 12, 2011
    #6

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  7. thepanfish

    thepanfish Flying Squid

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    You get to brag that you have an RO/DI and not just a plain boring RO
     
    thepanfish, Oct 12, 2011
    thepanfish, Oct 12, 2011
    #7
  8. AZDesertRat

    AZDesertRat Giant Squid

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    They sell it but its not standard on any of their systems. Any vendor will carry a variety of options because some end users will request it but that does not mean they are the best available technology.
     
    AZDesertRat, Oct 12, 2011
    AZDesertRat, Oct 12, 2011
    #8
  9. libog2fish

    libog2fish Fire Shrimp

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    So I plumbed my DI resin...
    I purchased a canister to put the DI into,As of this will be my first DI addtion do you fellow reefers think I need to run 2 caniters per RO unit...
     
    libog2fish, Oct 15, 2011
    libog2fish, Oct 15, 2011
    #9
  10. AZDesertRat

    AZDesertRat Giant Squid

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    Benefitting fro dual DI depends on how bad your tap water TDS is, how efficient your RO membrane is and how much water you make. You might be just as well off to buy premium resin like Spectrapures SilicaBuster and stick with a single full size vertical DI filter.

    What are your tap water and RO only TDS readings?
     
    AZDesertRat, Oct 15, 2011
    AZDesertRat, Oct 15, 2011
    #10
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