RO/DI Sulphur smell?

[BradR]

Have used a captive purity RO/DI with the DI removed for 4-5 years. After plumbing the output line into my sink months ago I started noticing a strong sulphur smell from the RO unit for the first hour. I only use the unit 1-2x a week.
Took it apart and the RO and post RO area was covered in black film. Yeck. Cleaned the unit as best I could, bought another RO film from M. Depot and things were fine for a month.
Now its back. I run the unit post a new culligan water softener which filters our well water (which was fairly hard).

-Is there any way to clean this without ruining the RO film?
-Am I going to be stuck running water thru this every other day for 15 minutes to prevent anerobic activity?

Thanks for any suggestions.

Smelly in Michigan

[BradR]

bump...

[Shoestring Reefer]

I haven't heard about that, I'll give you another bump.

MAYBE you could fix the problem by back flushing your membrane, but that's just my 0.02. At least it's your waste water.