I’ve got an inground pool that the previous owners did not take care of. I am new to owning a pool and have a couple questions. 1st in my skimmer at the bottom there are two holes I know that they are the suction and the equalizer connected to my main drain. My suction line has a hose adaptor screwed in for vacuuming. Does that stay screwed in permanently or do I take that out after vacuuming.