<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/#comment-97185>
<http://schema.org/text>
"i dont know that they are better or worse than any other filter option, but they have sort of faded into the past.  most people tend to want the latest and greatest, newest, bestest thing. right or wrong, it is what it is.\n "
<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/>