If you mean the rail as in where it attaches to the tube/pole of the swimming pool, try adding some rubber between the tube and the skimmer bracket, that worked on our previous pool. We also had to take it out when the kids were in the pool, because of them jumping around, the skimmer more than once came floating up. If you mean the connection on the vertical bar of the bracket, there should be a screw fitting which you can fasten tighter, that will prevent the skimmer from going up or down. Last but not least, make sure there is not to much tention from the tube at the bottom that connects to the outlet. If so, try turning it or moving skimmer closer or further away from the outlet.

Try and use some rubber strips around the poles where it attaches at the top and move it closer or further away from the intake, so the hose from the skimmer to the intake puts a little pressure on it to stay in place. Also try rotating the hose at the bottom of the skimmer, sometimes it is twisted slightly and it pulls the skimmer into the pool. 👍🏻

Hi, I use a piece of a flat rubber mat around the frame of the pool where the skimmer attaches, to prevent the skimmer to float up and inside the pool I use an old plug from a bestway pool to keep the skimmer of the liner and more vertical. The plug is a flexible plug like this one: www.ebay.co.uk/itm/325525521706?chn=ps&_ul=GB&var=514558569047&norover=1&mkevt=1&mkrid=710-169684-531343-4&mkcid=2&itemid=514558569047_325525521706&targetid=325425753764&device=c&mktype=pla&googleloc=1010437&poi=&campaignid=20649934318&mkgroupid=153764631759&rlsatarget=pla-325425753764&abcId=&merchantid=113272709&gad_source=1&gclid=Cj0KCQjwhb60BhClARIsABGGtw9DasF1MIJkTqJ8sN_pb9YNzEsXus_PwlEByiyT70S8-sk92mJpmTEaAoGHEALw_wcB