120 Gallon Tank Thoughts? Unlevel 125 fresh/salt

Hey everyone. We've had our 125 setup in this spot for 6 years now. This entire time, the water level has been unlevel. The left side is lower than the right.

The tank sits in a nook that's almost a perfect fit for it, so it's impossible to hammer in any shims.

How bad does this water line look to you? Should we be worried after this many years of having it running with no issues? Thank you!

 

I don't think there is any reason to worry

 

I would say as long it’s not twisted and just uneven equally on the left n right I would say it’s ok

 

Yall are definitely making us more at ease. Thank you!

 

As long as all four bottom corners of the tank are resting firmly on the stand, no worries.
I'd venture to say that the majority of aquariums aren't perfectly level due to floor & stand imperfections. Sometimes even the bottom tank braces are unevenly attached making leveling almost impossible. Btw, nice looking set up.