In ground pool when filled up and pump running water is leaking somewhere but will stop after it under the skimmer could someone please tell what might be wrong?

1. Skimmer O-Ring Failure:

- The O-ring in your skimmer might be damaged or worn, causing water to seep through. Check the skimmer basket and ensure the O-ring is properly seated and in good condition. Replace it if necessary.

2. Loose Skimmer Lid Gasket:

- The gasket on the skimmer lid may be loose or damaged, allowing water to leak. Inspect the gasket for any gaps or tears, and tighten the skimmer lid securely. If the gasket is worn, consider replacing it.

3. Broken Skimmer Basket:

- A cracked or broken skimmer basket can cause water to leak into the pool. Examine the skimmer basket for any damage and replace it if it's cracked.

4. Incorrect Plumbing:

- Improperly installed or damaged plumbing lines near the skimmer can be the source of the leak. If the water level drops below the skimmer and the leaking stops, it's possible there's an issue with the plumbing connections. It's best to have a professional pool technician inspect the plumbing system.

5. Hole or Crack in the Pool Wall:

- If the water continues to leak even after addressing the skimmer-related issues, there might be a small hole or crack in the pool wall. Cracks or holes often occur in areas near the skimmers. Inspect the pool walls and underwater surfaces for any visible damage. Repair any holes or cracks you find.

6. Faulty Pool Return Jets:

- If the leaking occurs near the return jets, inspect them for loose fittings or damaged parts. Tighten any loose connections and ensure the jets are properly installed.

7. Broken Underground Pipes:

- Underground pipes connected to the pool system, such as the suction lines or return lines, might be damaged. Unfortunately, this issue can be difficult to diagnose and requires professional inspection and repair.

If the problem persists or if you're unsure about the cause of the leak, it's highly recommended to consult with a professional pool technician who can accurately identify and fix the issue.