Black filter color on ATX50

[ADH]

After using rental tanks at new place for 6 dives in three days, filter in my Apeks ATX50 first stage became black/brown (more of a black). Looks like dirty air to me. Does anyone one know where can I get filter replacement pack on internet? I'll buy few, since air quality differs from shop to shop anyway.

 

[Scubaroo]

Inform the shop you rented your tanks from. Sounds like their compressor needs maintenance.

 

[Waterlover]

I'd have my regulator serviced not just change the filter. Sounds like either the compressor filter broke, whichs lets the activated carbon in the system(black) or there is alot of water(brown/Black) in the tanks/air system. Either way full service might be good idea.
Were the tanks steel or Al?
Ken

 

[ADH]

Tanks were aluminum. I also had one mine, which is stainless steel Faber 95 with only 10 dives on it. Looks like after using my tank-filter is getting lighter color, like it's cleaning itself. So, it might be dirty aluminum tank as well.