How often do you replace your RO/DI membrane?

[CyanoMagnet]

Hi guys , its been a while since ive posted here, and I guess because I havent had any problems. My tank is doing well with minimal work. My question to you is about the RO/DI membrane. How often should I replace this?

 

[lpkirby]

depends on the membrane, some as long as 3 to 5 years?

 

[skireef]

I replace my spectrapure membrane once every 5 years. I have well water.

 

[CyanoMagnet]

Thanks alot!

 

[bhdmc]

A TDS meter monitor the preformance of the RO/DI system. This will help you know when to change cartridges/or membrane.