Advice on Hairline crack on pool ledge

[AMH1]

Hello,
We had our pool replastered last year in November 2022 and a few days go I noticed a hairline crack (about a foot long) on the sitting ledge. We had 2-3 days of freezing cold temreature weather in the Dallas area last week and my pool pump was on Freeze guard and ran continuously and water was always moving and circulating freely with no issues.. I'm pretty sure I did not have this hairline crack before the cold weather , so I did a Dye test and it does not look like there's any water leak !

My plaster pool warranty was for 1 year, so I don't think the contractor will do anything for me. Just wondering if some of you have seen hairline cracks like this and what can I use to repair or fill this crack.

Thanks for any help and suggestion!

 

[AQUA~HOLICS]

I personally find this situation most commonly with a crack in the Shotcrete below the plaster especially on steps and seats due to the use of rebound.

Lots of plaster patch products, this is one I see used most often with good results.

 

[AMH1]

Aqua-Holics....Thanks very much for you help , I will order some and keep around the house for future repairs as well.