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12/29/2014, 11:11 AM
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#1 |
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Registered Member
Join Date: Jan 2012
Posts: 68
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Post DI TDS
At what TDS reading do you change the DI resin? Mine is 22 and I'm guessing it may be time.
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12/29/2014, 11:14 AM
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#2 |
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Registered Member
Join Date: Jul 2012
Location: New Brunswick, Canada
Posts: 741
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I change mine at anything over 0. 22 seems really high for post membrane. What are you starting at?
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90g corner overflow, 33g sump, Apex, Vertex IN-100, 2x MP-10w ES, 1X MP-40w, Tunze Osmolator, 60lbs Caribsea oolite, 85lbs live rock, 4x54w T5 with LED moonlights |
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12/29/2014, 11:19 AM
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#3 |
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Registered Member
Join Date: Jan 2012
Posts: 68
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I started at zero once I added the DI canister, it was an add on.
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12/29/2014, 11:20 AM
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#4 |
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Registered Member
Join Date: Jul 2012
Location: New Brunswick, Canada
Posts: 741
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Do you know what your water is before it enters the system at all, or at least pre RO membrane?
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90g corner overflow, 33g sump, Apex, Vertex IN-100, 2x MP-10w ES, 1X MP-40w, Tunze Osmolator, 60lbs Caribsea oolite, 85lbs live rock, 4x54w T5 with LED moonlights |
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12/29/2014, 12:15 PM
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#5 |
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RC Sponsor
  
Join Date: Sep 2009
Posts: 14,173
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I change mine once I see 1 TDS on the meter too. My RODI is a 5 stage and has a 2 stage DI. When the first DI cartridge reads 1TDS, it's switched and that preserves the second DI cartridges life. I get nearly 1000 gallons out of my first stage DI and much more out of the second stage despite my 475+ TDS tap water. I always keep spare cartridges on hand and keep my spare DI's in the refrigerator to prolong their shelf life.
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Director Customer Support Royal Exclusiv USA For All Royal Exclusiv & Bubble King questions please refer to our Sponsor forum: http://www.reefcentral.com/forums/fo...play.php?f=745 Current Tank Info: 480G display mixed reef, 90G sump, 90G refugium, 60G display refugium. Check out my build thread: http://www.reefcentral.com/forums/showthread.php?t=1783476 |
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12/29/2014, 12:40 PM
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#6 |
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Registered Member
Join Date: Jan 2012
Posts: 68
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My tap water is in the neighborhood of 375
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12/29/2014, 01:38 PM
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#7 |
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Registered Member
 
Join Date: Jul 2009
Location: Iowa
Posts: 9,671
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I have 2 DI stages. TDS coming out of the RO and into the 1st stage of DI is around 15. I keep my newest DI resin in my last DI stage. Once that last stage registers 1 I move it to the first stage and put new DI resin in the last stage. This lets me use up as much of the DI resin as possible.
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rebuild and recovery log: No more red house, you'll have to click on my name and visit my homepage! You can check out my parameters at reeftronics dot net website and look for my username. Current Tank Info: 180g mixed reef w/ a beananimal overflow to a dolomite RRUGF. | 20g long G. Smithii Mantis Tank |
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