Why Is My Pool Losing Water Overnight?

Doc’s Leak Detection • Indianapolis & Central Indiana

If your pool loses water overnight, evaporation may still play a small role, but repeated overnight loss is a stronger reason to suspect a leak.

What overnight water loss can mean

• A structure, liner, light, skimmer, return, step, or fitting may be leaking.
• A plumbing line may be losing water while the pump is running or while the system is off.
• Equipment-side leaks can sometimes only show when the system is operating.

Details to track before calling

• How many inches the pool loses in 24 hours.
• Whether the water drops more with the pump on or off.
• Whether the water level stops at a light, skimmer, return, step, or other feature.
• Any wet spots, air bubbles, or recent repairs.

Why testing matters

• The same symptom can have several causes.
• A structured diagnostic process using LeakTronics equipment first helps narrow the source instead of guessing.
• Written findings help guide the next step.