New to the forum so go easy on me if I am not doing this right.... LOL!!! I was given a 24' x 48" Intex pool with a over the wall skimmer and a 2640 GPH pump with a 14" sand filter. By reading other post I know you can attach a regular vacuum to it but I am still confused on what size vacuum hose I need to attached to the blue thru the wall piece that the skimmer hose attaches to. 1.25" or 1.5"?