What could cause this calcium buildup on the exterior of my pool?

[JamesW]

Typical Geotechnical Information Required for Design of a Swimming Pool - Pool Engineering

We often get asked by our clients what sort of geotechnical or soils information do we need in order to design a swimming pool. This article is intended

www.pooleng.com

Preventing Structural Failures With Soils Reports

How often do you get a soils report before starting a build? Without one, you run the risk of significant cracks and structural failures. Bill Rowley shares more.

www.aquamagazine.com

Ground Work - Pool Engineering

There’s no room for guesswork when it comes to structural engineering, says Ron Lacher of Pool Engineering, Inc., and that’s especially true for concrete

www.pooleng.com

https://geotecheng.com/wp-content/uploads/2020/09/guidelines_swimming_-pool.pdf

 

[Dirk]

Before we dig up this guys entire pool, let's see what @mcleod says about the efflorescence.

 

[willerd]

This is fantastic information, thank you both. Fortunately no cracks on the interior of the pool, nothing that has gone completely through the gunnite and plaster in the interior. The only crack that I see is a straight line that wraps around the hot tub, which is still concerning to me, but I have had two inspectors look at it and say that it is not an issue (and I am having another come tomorrow), although if you have any concerns I am all ears.

(the black lines are a reflection from telephone lines - this confused the heck out of me at first!).






I will use this information to find the correct engineer for the job.

 

[ajw22]

The only crack that I see is a straight line that wraps around the hot tub, which is still concerning to me, but I have had two inspectors look at it and say that it is not an issue (and I am having another come tomorrow), although if you have any concerns I am all ears.

I would only be concerned about the line int he hot tub if your found it was leaking water.

To me it looks like something scratched the plaster while trying to clean the tub.