POOL LOSING WATER OVERNIGHT? POSSIBLE POOL LEAK

Pools typically lose less water overnight because temperatures are lower and there is less sunlight and wind.

If your pool is still losing significant water overnight, common causes include:

• Underground plumbing leaks
• Pool light leaks
• Skimmer leaks
• Return fitting leaks
• Structural cracks
• Equipment pad leaks
• Spa or spillover system issues

Normal overnight water loss is usually very minimal.

Potential signs of a leak include:

• Water drops more than ¼ inch overnight
• Water loss continues regardless of weather conditions
• Pool requires frequent refilling
• Water level consistently drops to the same point

If you’re unsure, performing a bucket test can help confirm whether you’re dealing with evaporation or a leak.

👉 Related: Bucket Test Guide

Look for these common symptoms:

• Pool loses water overnight
• Water level drops even when the pump is off
• Wet spots near the pool or equipment pad
• Higher water bills
• Pool chemicals become harder to maintain
• Water level stops at a certain elevation

1) Mark the water level before bed

Use a piece of tape or marker to mark the water level.

Check the level again the following morning before anyone uses the pool.

If you notice significant loss, further testing may be needed.

2) Perform the bucket test

The bucket test helps determine whether water loss is caused by evaporation or an actual leak.

👉 Related: Bucket Test Guide

3) Watch where the water stops

If the water repeatedly stabilizes at the same level, the leak is often located near that elevation.

👉 Related: Pool Water Level Stops at One Level

4) Compare pump ON vs pump OFF water loss

If water loss is worse when the pump runs, the issue may involve the plumbing system.

👉 Related: Pool Losing Water When The Pump Is Running

Even small leaks can become expensive over time.

Ignoring a leak can lead to:

• Higher water bills
• Increased chemical costs
• Soil erosion beneath decks and patios
• Structural damage
• Larger plumbing repairs later

The sooner a leak is identified, the easier and less expensive it typically is to repair.

To pinpoint the source, professionals may use:

• Dye testing around fittings and leak-prone areas
• Pressure testing of plumbing lines
• Equipment inspections
• Leak isolation testing
• Structural crack evaluation

Once confirmed, we recommend the proper repair based on the actual source of the leak.

Schedule professional pool leak detection in Tampa if:

• Your pool loses water overnight
• The bucket test points to a leak
• Water loss exceeds normal evaporation
• You notice wet spots around the pool
• You want the exact source identified before damage worsens

If you’re in Tampa and your pool keeps losing water overnight, we can pinpoint the exact source quickly.