TFC Membrane

[Loer]

Does anyone know how often a TFC Membrane, in a captive purity ro unit, should be changed? ..have a new one but can't get the old one out so i was gonna leave it for a while longer. i've had this unit for about a year already.

 

[reefman]

depends if your rejection rate is being met. check with a tds meter.

 

[fishman1069]

if your water isnt to bad going in, the membrane is supposed to last 2-3 years!