The shotcrete was completed 4 days ago, and by the next morning I noticed that there were some cracks on the floor of the spa. I understand that its is normal to have some cracks on the concrete, but I am wondering if cracks this large are normal, or should I worry? There are about 4 other thinner cracks on the floor of the rest of the pool, but they are much thinner than the ones on the spa. Below is a picture of the spa floor. What do you think?