Cracks and Leak in Brand New Pool

[pool2013]

Very much appreciate the feedback and guidance! Interesting about the algae. The water temp has jumped a lot in recent weeks which could help explain why it just started as we have had 0 algae issues until around now. I am able to get the algae off with a mask some pressure water from the hose and a lot of underwater elbow grease scrubbing. I'm going to try shocking the pool to see if that keeps it from coming back within the day.

To the bigger leak issue, not sure if I am posting pics correctly but below is an attempt. You can see the crack running down just left of the corner. The pool contractor did a dye test and confirmed the leak was in this location and that is it pretty severe. They are contacting the concrete company and are supposed to get back to me this week.

The pool contractor did the start up and maintained the pool until early June. I've been dilligent with it since then and have kept weekly records including a late June water sample analysis from Leslie pool. Going to get another one from them today and will get the test kit you recommend. (I have been using the one that came with the pool until now) The PH has been running at the high end of the range but I hear that is normal for new pool with a salt system. I've been careful about adding acid diluted in a bucket as per the instructions. Can't imagine any chemistry issue would casue a pool to fail in 8 weeks but to your point, want to have all bases covered just in case.

Again, I really aprpeciate the help and will keep you posted on how it goes.