180 gallon tank off the level by 0.3 degrees - is that ok?

[skitty]

Hi,
I am filling a 180 gallon tank on a 300lb stand today, on the second floor of our house... The house is old so the tank leans about 0.2-0.3 degrees toward the centre of the room and front of the tank. I will continue to track the level as we fill it.

My question is, how much is too much? 0.3 degrees is not a huge amount of extra force on the front of the tank, but I'm not sure how to calculate this, nor how much extra force the tank wil take.

 

[charliebankston]

I'm not sure what the fail point is, but my house is older too and none of my tanks are exactly level. If the bubble is within the center line marks i don't stress on it much. It's my understanding that an aquarium that's torqued is more likely to fail than just being unlevel. Ie one corner is higher than the opposing corner. I have used wood shims under the stand on the floor before to level it up a bit. Never under the tank due to the torque issue.

 

[Brookster123]

Shim the front of the stand