hello, I'm new to the forum but here for some help & advise. I have a 12x24 above ground oval pool. I woke up this morning to my water level dropped below the skimmer. I noticed one wall is buckled, support bars are pulled from the pool wall at bottom & slightly caved in at top. Liner is leaking in the area, looks like the seam may be split, also have a crater on bottom of pool where sand must have washed out. What can I do to repair this? I would like to not replace the liner if possible, it's only 2 years old. Do I need to completely drain it to fix the supports & straighten the wall? Also what could have caused this? Did the leak cause it?