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

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Aquarium Advice Apprentice
Nov 20, 2020
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.
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.
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