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If the grass was only covered with the pool cover for a couple days then it should be fine and recover. It may look bad and somewhat brown, but I have I have seen scenarios where we were intentionally trying to kill grass with tarps and it took over a week to kill it.
I recommend watering it everyday for atleast 20 minutes for the next few days until you start to see some of the color return. Keep the top layer of soil moist and it should recover.
Thank you, it was only cover for a couple of hours, so I'm glad I won't have to do any extensive lawn work to get it to recover, thank you again
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