RO membranes are not THAT expensive. JL or Bulk Reef supply if you can make a states run.
keep in mind if you buy a new membrane that the flow restrictor matches.
Do you know any details from before?
how long the guy had it?.
Being a sealed cannister with only 1 tube in and 1 out It's pretty hard to dry out the RO membrane.
again do you have the rating of the unit?
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