SRC Member ml708 Posted February 2, 2014 SRC Member Share Posted February 2, 2014 If I have a high ppm reading, does that mean my ion exchange resin is not working, or the RO membrane is not working, or both? Apologies if this is a silly question. Quote Link to comment Share on other sites More sharing options...
kraken Posted February 3, 2014 Share Posted February 3, 2014 change your resins 1st, if TDS is still high, change the membranes Quote Link to comment Share on other sites More sharing options...
SRC Member ml708 Posted February 3, 2014 Author SRC Member Share Posted February 3, 2014 Usually it's the resin that starts to degrade first and not the membrane? Why is that so? Quote Link to comment Share on other sites More sharing options...
SRC Member brojj Posted February 3, 2014 SRC Member Share Posted February 3, 2014 Most of the task of removing TDS is done by the resin. Quote Link to comment Share on other sites More sharing options...
SRC Member youdontnowm Posted February 3, 2014 SRC Member Share Posted February 3, 2014 Most of the task of removing TDS is done by the resin. nope, is ro remove most of tds first Sent from my GT-N7105 using Tapatalk Quote | Display : 48x30x22 Skimmer : SK-201 skimz | Sump : 30x24x18 Wavemaker : 2x RW-15 , 1x RW-8 | Cooling : 1HP titanium drop in coil ATO : JBJ | Lighting : ATI Sunpower 8x54w + 48x cree xte royal blue Return : Jebao dc-6000 | Dosing : Jebao dosing pump [ CaCl2 + NaHCO3 ] Pump : | Reactor : FSZ Z160 zeolite reactor & phosban 150 | System : ZEOVIT decomm-ed : Ydkm SPS reef >><< Link to comment Share on other sites More sharing options...
SRC Member brojj Posted February 3, 2014 SRC Member Share Posted February 3, 2014 Thks for the correction. Quote Link to comment Share on other sites More sharing options...
kraken Posted February 4, 2014 Share Posted February 4, 2014 resins just wear out much faster than the ro membranes, rule of thumb, change ro membrane every 6 months. Quote Link to comment Share on other sites More sharing options...
SRC Member ml708 Posted February 4, 2014 Author SRC Member Share Posted February 4, 2014 So on average how often should I change resin? Quote Link to comment Share on other sites More sharing options...
Guest Posted February 4, 2014 Share Posted February 4, 2014 So on average how often should I change resin? When you tds reading start to raise. Sent from my GT-I9300 using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
SRC Member ml708 Posted February 4, 2014 Author SRC Member Share Posted February 4, 2014 It's purely a hypothetical question at the moment, getting a TDS meter tmr and will report back on the reading. Quote Link to comment Share on other sites More sharing options...
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