How fast on an average 21 C degree day with overcast skies should the water level drop. We have a liner with a tile pattern and it is very easy to see the water level go down by over an inch in one day. The pool is less than a year old (60,000 litres) I am concerned that maybe there is a leak? I have found the liner at the edges along the bottom seems like it is stretched away from having any solid contact with the corners and feels soft like it could punture easily...is this normal? If it isnt is the pool company responsible to fix it?