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Circle of death

Hi! I set up a pool earlier in the year for the first time and kinda left it there for way longer than I was meant to (oops) and now it’s left what I call a circle of death, aka a circle patch of dead grass. I thought it would of grown back but I’ve just been made aware it’s dead so it can’t grow back (duh) and I would DIY it but I don’t wanna muck it up… again…. Help! The patch is no more than 2mx2m. I will add photos once i get there either later today or tomorrow (it’s at my old rental)