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Update: Fully drained spa and inspected whole surface. There are noticable cracks with length anywhere from foot to 3 ft length and ~1/32" width. One area sounds delaminated using tap test. After removing bottom drain cup I see exposed gunite under it. The area around drain pipe on the side...

I test the chemistry every other week. My water is high on PH and low on hardness. Other parameters are within the norm. I try to manage this using chemicals but this is not always doable on time because of my travel. I did my research on this pinhole leaks and leaning towards applying epoxy...

Took a picture (I wish I'd take a video). The pinhole is somewhere in the pointed area. The area doesn't look damaged. But I noticed those little pebbles tend to detach and overall the liner looks and feels very rough, which could be a lack of water hardness (the separate concern I am managing)...

Hi all, happy New Year! New member here with the question. I own a home with the pool and today when I was winterizing it, during spa drain, I noticed tiny air bubles coming out of one spot where sitting surface curls to a vertical line. The bubbles were tiny (1mm) coming out every other second...