Round spot in new fiberglass pool

[yp93]

Hi All!

We just had our pool finalized and when cleaning it from post-build stuff noticed this:


What can it be? Pool is fiberglass with salt-water chlorine generator. Chemistry seems alright - ran a test in Leslie’s and everything is within limits.

Thanks!

 

[Texas Splash]

Welcome to TFP! A bit hard to tell in the photo, but we have something similar in ours. In our case, it looks like a spot where perhaps the shell was hung or held in place while they applied the gelcoat. Maybe a brace spot or something. Ours looks like a big ringworm spot with a slightly different color in the middle.

 

[Texas Splash]

Here's is a shot of ours when I had the water lowered. When full, you don't see the chalky stuff but the circle is visible.

 

[yp93]

Oh interesting! When under sun you cannot even see it. In shade you do though. Here is another shot

 

[mknauss]

Welcome to the forum.
A bit of gel coat inconsistency. I suggest you embrace it. There is no fix that is not much more noticeable.

 

[yp93]

Thank you for all the replies!

Just to be sure: this cannot be caused by any chemicals or water quality (test are all good)?

 

[Texas Splash]

Just to be sure: this cannot be caused by any chemicals or water quality (test are all good)?

No. Just one of the few imperfections we find from the gelcoat application process.

 

[yp93]

No. Just one of the few imperfections we find from the gelcoat application process.

Thanks again. Makes me feel much better. I thought something might have got messed up either during construction or afterwards. The thing doesn’t bother me as much as a thought that we could have caused this somehow.