Coincidentally people who own exorbitantly expensive fish and can afford to feed them every day have the similar means to pay full price for filters. This is monsterfishkeepers.com after all
There are also people who are tired of paying premium price for less than premium products.
There's different styles of fish keeping and theres nothing wrong with fluval or Eheim. My main point and question as the Op were basically "if you dont like these chinese filters, have you actually tried them?"
If I had $300 to spend on filtration for a large tank, I'd pick up 2 knockoffs for the price of a single name brand unit. I'd trust the redundancy of the two filters all day long. Fluvals are great filters, but they can quit working just the same as anything else. I think it's foolish to only have one filter on a tank anyway aside from safety it makes maintenance easy. But then again if I hit the lottery I'd buy a pair of 2262's
So I guess no matter how one cuts it this is just an argument of economics.
If the German filters were still exclusively built in Germany I think this would all be a moot point
:edit: if you have prized fish, and can't afford for a filter to fail, then your doing it wrong, quit rolling the dice and put some redundancy in your system
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