FYI, the Vario is also intended for turbid water.

http://www.backpackgeartest.org/reviews/...Ray%20Estrella/

And unlike the pocket I have used it. I doubt it would break as easily as the MSR plastic handles.

And as I said... every single filter has its limits. Why I kept bringing up the flocculant.

The ULA filter is no longer made, so any gravity filter you find will be MSR, Katadyn or Platypus - or Sawyer. I just saw a 4 liter Sawyer system in REI today. I have pondered getting the Sawyer purifier (same size and about the same weight as the filter, rated to 10,000 gallons) as a replacement when the hiker pro filter in the ULA dies - just splice the purifier into the Amigo Pro's hose.