<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/#comment-97152>
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"On the Lee’s I think you’re paying for the plastic being much more robust. It’s a hard to find and desirable product. I had the Penn Plax as a kid and remember it breaking when I tried to shift it from one setup to another. \n \n\n\n\tI just think many of us in the last 30 years bought into the idea that HOBs and canisters were better. This is before or during the early parts of the internet. At that time I was keeping cichlids and on Monster Fishkeepers and all everyone talked about were Eheim canisters and Aquaclears.  \n \n\n\n\tI think UGFs in certain setups just make so much sense. But in other setups sponges make sense. I’d love to do a tank with a corner mattenfilter. I’m just thrilled to have options that wont cost me 100s of dollars but deliver better  results. \n "
<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/>