I drained the pool and took off the liner. As i was stepping on the bottom my heart sank as it went "squish". I thought the pool was above the water table (there is a stream a lot lower I thought). In any case, there is a good sized circular break popping up and a black membrance underneath (I almost broke it but I don't think I did since the water is clear).
What do I do here? Do I wait and see if the water goes down, do I sump it out or do something with that plug in the bottom of the drain? I can repair the hole with hydraulic cement I believe. I'm hoping I haven't just done something that will kill my pool. It's a 20x40 inground and the bottom is **** honestly, I'm surprised they put a liner over it in the state I found it. I'm also wondering what I do to smooth it. I haven't ordered the liner yet and figured at worst I'd pour over everything on the bottom if I had to!
Note the wetter picture, that's tonight...so I plan to look tomorrow to see if the water is rising.
Any help appreciated, I feel embarrassed to ask.