Well it looks like Iím on the verge of a nut grass invasion there are over a dozen pointed things poking up in the bottom of my liner. They are spread out in spots around the bottom of the pool. Also my pool installer is coming out to check out the divots in the sand coving all around the pool that they claim are from burrowing animals not poor installation. But they have been there from when the pool was filled. I have never had any mole or other problems. The Pool has been installed 1 month now. Itís a 24í round above ground 52Ē high pool. Any advice?