IMO, remove it. i set up a tank and had all kinds of problems with the water parameters. took out the ugf and the tanks settled down and is now running fine. the problem with ugf's is that the debris can get trapped under the filter plates and stay there. you do have to vaccuum under the plates by running a syphon down the lift tubes to reach under the plates. with the many more efficient filters on the market ugf's are pretty much obsolete. also with cichlids are other fish that are prone to digging the plates become uncovered and useless.
jmo, they are more a pain than they are worth.
semper fi