<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/#comment-97232>
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"I completely get this, feeling!  I did some water changes today, just cause of that feeling.  I was really surprised at the amount of bla I stirred up around the UGFs. \n \n\n\n\t \n\tI often put a large hose down the uplift tube to pull out what is under there. \n\tOften I connected my return to the uplift tube forcing clean water up through the gravel. \n\tHalf the tank is pulling down into the UGF and then the flow is being passed to the next tube and going up through the next UGF. \n\tUGF and RFUG combo!!  Reverse Flow undergravel filters are really good when you want to polish your water.  \n\tAlso with my stands, at the time.  2X4s and concrete blocks or the default iron stands, it is very simple to look UNDER the tank and through the bottom to see how much dirt is there.  Which is also the only way to spy on the Kuhli that live there. \n\tIf your stand base is solid, this does not work. Obviously.\n \n\n\n\tThese days I am using a combination of methods with little to zero water polishing.   I only clean when I get that feeling!\n \n\n\n\tI love dirty tanks and detritus worms!! \n\tDid I mention SNAILS!!!\n \n\n\n\t \n \n\n\n\tThink I am going to go build a RFUG now!\n \n\n\n\t \n\t \n \n\n\n\t \n \n\n\n\t \n "
<https://forum.aquariumcoop.com/topic/12409-why-are-ugfs-not-very-popular/>