Pool is gunite I think (how would I tell for sure?), ~13,000 gallons. Two cracks in the deep end. Not really sure when they appeared, I just now noticed them. I live in Tucson, AZ and it is 110 degrees, so water evaporates crazy-fast. So I'm wondering if A) I have a leak and B) If these cracks are normal for a gunite pool.
I'll post some pics tomorrow (it's dark out now).
History: Pool was likely installed when the house was, back in 1982. The company that did it stamped their name on one of the steps (who knows if they still exist though). I've been here a year, and this is my first pool. All my levels are great (thanks to this site). I drained and refilled it about a year ago to get the CYA down (it was like 200+ or something insane).