i was trained not to turn off uf. if you don't want fluid removed we just do cleansing and and replace fluid set in the goal which rinse back is included and replace saline during treatment. the lowest we set our rate is 400. What reason would be to turn off uf? what harm is being done when uf is off during treatment? i was told by my DON that ingredients from the dialysate can get into the blood as it passes thru the dialyzer. would like input. thanx's so much i really enjoy this site.