tank levelling issue

[Ryan Joel Smith]

Got a bit of a scenario and need some advice. I've had my 120g 5'x2'x1.5' tank setup for about 24 hours now. I've noticed that the tank is a bit un level from front to back by about half a cm and its off by about half a cm from side to side as well. Prior to setting the tank up i spoke with my builder and he assured me that my tank placement on the main floor was fine. I'm assuming based on the fact that i can see the half cm gap between the floor a baseboard that it is the laminate compressing underneath. The basement has an open ceiling and i can see now gaps in any of the i-beams anywhere. My main concern is the stress on the tank. The tank is a used oceanic so the glass is very thick and all seems are in like new condition. Do i have much to worry about here? Should i just keep an eye on it for now?

thanks for any help.