lorem

Those cracks are a great deal of concern.
Swimming pools are designed to hold water in and keep water from entering from outside influences.
The efflorescence is showing signs of this occurring.
Most importantly, water leaving the pool from areas not designed for this can erode the soil surrounding it and lead to collapse or uneven deck movement.
 
I see a lot of different gaps and cracks in this picture.

Which color lines concern you and you want to discuss?

IMG_0015.jpeg
 
I noticed this gap earlier. Backstory was that the deck was poured, demolished, and then poured anew at the end of construction. The white stuff is perhaps efflorescence. Ground was waterlogged for a time and the white stuff disappeared entirely, now the ground is drying out and white stuff returned.

The cracks seem like maybe cause for concern. TFP must know what this is all about and what it means. If I missed a link in my search, apols.

Pool chemistry is balanced per TFP methodology with no 'innovations'.
Might help to see a picture farther away of the deck. Is it coping and pavers or Cantaleiver?

This is the crack Id be worried about.
IMG_4595.jpeg