We have owned a pool for two months - it was re-plastered just before we took ownership. Today, I noticed a few cracks around the "bench" in our built-in hot tub. I was losing daylight as I investigated and, upon turning on the main pool lights, I saw mild pitting and plenty of lines/slightly uneven marks along the bottom of the pool. I posted a photo although I'm not sure how visible it all is in there.
On a scale of 1-10, is this fairly typical, a matter of concern, or a major problem?
IMG_2890 by DC Orbiters, on Flickr