I did that to my 75 gallon a week after i got it still used it for 10yrs. I did ised that two part clear glue then sanded down flat finished with clear nail polish just so i didnt have to stare at it lol
So I have finally figured out why this has been a leveling nightmare! The top black rim of the aquarium is unlevel on the right side. I say puzzled wondering what could be the issue! Seems when they installed it they didn’t press down hard enough or what ever the issue may have been. And to top it off the front peice of glass sticks out to the right a bit on the bottom when it meets the side panel. At this point I am really disappointed with Aqueon I always a fan of their tanks. I measured the water levels from front to back on the side and they were the same. I sat puzzled that’s whenI measured the brace and discovered it was unlevel. I have contacted aqueon let’s see what they say