I personally would be leery of the "seams not aesthetically pleasing" comment.
Look for cracked and frayed silicone at edges.
Often a tank gets stored, stored outside in sun, silicone dries out and gets crumbly.
For what you just went through and what you are about to put into it, it's just not worth the risk IMO.
Mine was a CL special I picked up before joining here, I had no idea what to look for.
I got lucky and mine was not a complete failure, it just cracked as I was draining it when I realized it was failing and trying to rush into a new tank.
It's heartbreaking to look at your tank looking something like this and then seeing the pic I posted earlier when it fails, all that hard work down the drain.