What would youIf I cut a solar blanket into segments for a kidney shaped pool, would it work just like to ask?

Basically the guy before me had the solar blanket on a roller, but in order to use it, it has to be set up in the middle of the pool with the blanket being pulled in both directions (with 2 people always needed). Its a pain in the *** and I was thinking of taking it off the roller completely and then cutting it into thirds, 12ft long each section. Would it still have a decent effect in terms of keeping the water warm at night? Would it sink, would it overlap the other pieces at night?