I am relatively new to the hobby and I recently got a used aquarium that I am planning on using for my second tank. Its fairly old (2013) and I was planning to reseal that tank but as I was cleaning it up (very dusty) I noticed that the tank seemed slightly warped. When I pressed on one corner of the tank I could feel it drop even when on a level surface.
Video of the warp
Does anyone know if the tank is still usable or if I should just scrap it? I was thinking of putting some yoga mat under it like I have seen for some rimless tanks but i'm not sure if it will be enough to prevent the glass from cracking.
Thanks for any advice you can give.