I want to get a bigger tank anything 55g or bigger. I have a 36g bowfront that had a black painted back which I regret and I dont have a sump so I dont know what to look for in that area or what everything means. I've read a lot of posts of other peoples question when interested in buying another tank but I dont know what to look for like drilled, bracing. So what should I look for? I need everyones knowledge. Thank you.