A corner of the concrete deck surrounding my pool (40x20 in ground vinyl) sank. The sunk portion starts in the middle of the side where the skimmer is, and cracked the skimmer in the upper part. The skimmer does not appear leaking, but the opening in the ground is out of shape, and can not be covered with the square lid. If I were to replace the skimmer, how should it be done? Does the concrete around it have to be hammered open? Is it a big job?
Regarding the sunk deck, I asked a mud jack guy to take a look. He quoted $1k to jack it up. Is this reasonable? How can I be sure it won't sink again? Can I just add on top another layer of cement?