<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/#comment-97523>
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"At some point sure the roots could cause some issue, I have never had an issue roots blocking too much flow.  \n\tRoots need flow for nutrients and aeration.  In my experience UGF tanks have better plant growth. \n\tI have used back filters to grow tomatoes and the roots grew down the water fall into the tank and never clogged the back filter.  It certainly looked clogged, but the water fall was still running strong.  \n\t \n "
<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/>