Hello, I decide get back into the hobby again and I have a older 75 Gallon Oceanic Aquarium and after plumbing it and filling it to test it to see if there is any leaks I noticed the left side glass edge was a little off from the front Edge didn’t notice it, But the silicon looks good and Strong. There’s no leaks it’s been full for a few days. I don’t know if it was built like that. The person I got it from said everything is good. So I was just wondering your thoughts should I use the tank, is it good to use??