I posted my thoughts on the Hyperflow in the previous thread on this filter, and nothing has really changed since using it again. It functions as advertised, and in general I like it. The question I have has to do with the pumping force required.

I follow the directions and back flush the unit once a day (after pumping about 8 - 10 liters of water) while out using it. I have noticed that in just a few days of use (that's total use over a couple of trips) even with back flushing that the pumping force required has increased tremendously, and this is after filtering clear water. I’m not a body builder but I try to stay in decent physical condition, and I am having trouble pumping this thing. What are other user’s thoughts on this? Could it be that I have a faulty unit (I have read that some people are having problems with the Hyperflow…could be that I should have waited till the bugs were worked out)?