Well, i'll answer my own question: it can apparently be used. I borrowed a friend's plastic hose and set it up with my kreepy krauly classic. It run perfect for 2 different sessions of 2 hour each. End result is very clear/ clean. Much cleaner than when i do it manually every day. It's negative effect on my AG pool vinyly lining? I dunno. I just ordered my own set of hose and will use it judiously and until i get a clearer answer on this.

Thanks