Is this a leak?

[rich6429]

Been loosing about 0.5-1cm of water every night but assumed it was due to evaporation, and would normally top up at night. I have been keeping my pool temp at 70f with the outdoor temperature being in low 40’s at night. I dont see a significant water loss during the day, maybe even no water loss.

That being said, I noticed this bubble on the pool wall this morning my steps. Is this a leak? What could be causing this slight bubble?

Thanks.

 

[Texas Splash]

That appears to be a good sized bubble. I would be concerned water is finding its way behind the liner. Perhaps some got through the seal at the top of the coping, or perhaps a seam in that area? Or maybe moisture has a way to slip through the decking somewhere between the wall and liner? How old is this install? Is it still new enough for the installer to inspect?

 

[ajw22]

Been loosing about 0.5-1cm of water every night but assumed it was due to evaporation, and would normally top up at night. I have been keeping my pool temp at 70f with the outdoor temperature being in low 40’s at night.

That will cause lots of evaporation. It is like simmering a pot of water on the stove.

Evaporation of Pool Water - Further Reading

www.troublefreepool.com

That being said, I noticed this bubble on the pool wall this morning my steps. Is this a leak? What could be causing this slight bubble?

That is more likely ground water getting behind the liner.

 

[rich6429]

That appears to be a good sized bubble. I would be concerned water is finding its way behind the liner. Perhaps some got through the seal at the top of the coping, or perhaps a seam in that area? Or maybe moisture has a way to slip through the decking somewhere between the wall and liner? How old is this install? Is it still new enough for the installer to inspect?

was only open for 1 month at the end of last season, and only 2 weeks this year so far. Not too worried since I can still have my pb to inspect and repair, but just the whole incovenience is frustrating after paying $$ for this.