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ben M

  • Posts: 4720
membrane RO 4040
« on: May 05, 2013, 06:36:08 pm »
new pre filters, tds 025 after RO 4040, do i have to change my membrane? when do you change it?
thanks
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Lee GLS

  • Posts: 3844
Re: membrane RO 4040
« Reply #1 on: May 05, 2013, 06:46:17 pm »
Pre filters will not effect the tds, only the prediction speed. You change your membrane when you feel you are spending too much on resin.
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ben M

  • Posts: 4720
Re: membrane RO 4040
« Reply #2 on: May 05, 2013, 07:04:53 pm »
Thanks Lee.My tds went up from 10 to 25 in 3 months time  :( Is it normal? Did i do something wrong? thanks
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