I am on the verge of setting up my first marine tank, Fluval Roma 240. Really excited about this! Anyone else put a large tank upstairs in their bedroom?
Will be fine.
I have a 190l in the corner (first floor) in a 15th century barn. So, yours will be fine
If you want to be extra carefull, put it across the floor beams, rather than along them. But to be honest, for a tank of that size, its not an issue.
Search the net, if you can find 1 story of a tank going through a roof, I will give you an E-cookie