@Poconos: Thanks for the suggestion, I will try the dye test. I do have a leak in my pump motor that I cannot see, but I am fairly certain this crack is leaking because I have let the pool go all day (10-12 hrs.) without the pump running and am still losing a significant amount of water. I have also searched the liner for any holes/leaks and cannot find any.

@SalemCastles: I found this epoxy on Amazon and will order if the dye test proves positive.

Thanks for the help. I'll let you know what happens.
-A