I'm stunned really! I saw last night that my tank is slightly tipped forwards.

At first I thought the tank was supposed to look like that but when I checked the floor around it with the water level it turns out the whole floor is sloping! It's all empty now so there's no emergency, but there surely could have been. What can I do to correct this? It's not a major slope, but I'm still worried. Should I be? I had it running for 7 months and nothing happened. There's no other place for the tank so I can't move it.

And I can't do anything to the floor since I'm only renting this apartment.
The tank itself is a 47 gallon bowfront, the front of it and the sides are cast in one piece. It's glued to the back and the bottom though. The stand came with the tank and has 6 legs. I have no batteries for the camera at this moment but I can post pictures tomorrow if you need some.
I hope I can get some advice on this, and that it can be fixed as soon as possible.
/Nattviska