Now the bad...
On Saturday, while the PB was onsite, the electrical wasn't working. My electrician came out on Sunday and got it all straight. The PB had given me instructions on getting the pump running, and so I did. All was fine. However, after an hour or so, I realized the water level was dropping. We (my family) started to investigate, and (LUCKILY) realized that the PB missed cutting in one return. There are five returns to the pool, and only four were completed. So, water was being injected between the liner and the steel wall. Obviously, I immediately stopped the pump. I called the PB, and he was frustrated with their miss, and apologized profusely. He is correcting today.
I tell all that to get to this point. Yesterday afternoon, my son tells me there is a big dent in the bottom of the pool. I didn't do anything at the time, and I was out of the pool for the day. But, when I turned on the light last night, here is what I saw:
For reference, that is probably six inches wide and at least two feet long in total. The deepest part is probably two inches (maybe more?) below the normal pool bottom. Needless to say, I got my shorts on and went in to check it out. It is firm poolcrete under there...it just seems to have collapsed or cracked and fallen. The dark part is the flat shallow end, and the lighter part is the slope headed into the deep end. The edges of the dent aren't what I would call sharp like a knife, but the drop off is sharp if you know what I mean. My head immediately goes to the water running under the liner for an hour. We lost about two inches of water, so it was MANY gallons.
So, regardless of the cause, what is the fix here? I am assuming it's a drain of the pool, and pull back the liner to fix the poolcrete. Other ideas? The PB is supposed to be looking at it today, as I sent him the pic last night.