I am considering buying a 180 gallon tank. I am going to put it in my room on the main floor of my house. Will I need to worry about the floor holding the weight of this tank?
Hello; here is the web address of an article that talks about the issue.
http://badmanstropicalfish.com/articles/article28.html
My take is that the question can only be answered by someone with knowledge of structure actually having a look to see what you have and what condition it is in.
A 180 gallon may weigh from 1800 to over 2100 pounds with stand, substrate and all equipment.