That depends on the landlord.
How LARGE are you talking about - 3,000 gallons -NO , but 30 gallons or so is Ok =K if weight is not concentrated on one spot.
the answer is nothing ok
The fish will be living alone in the aquarium. And that's ok.
Very large.
Only a very large aquarium would be suitable.
Yes but it is best if they are of opposite sex and similar size. Small groups can get along OK provided the aquarium is large enough.
Its hard
I would say yes it would be ok not to put anything at the bottom of the aquarium. Gravel, stone and plastics are usually used for appearance. If it is a freshwater aquarium and if you plan on using live plants then gravel is necessary.If it is a salt water aquarium then it is necessary to use live rock and live stone.
An aquarium fish that is usually considered big, is like 8 inches and up.
Aquarium fish are often called tropical fish, since most come from areas near or within the tropic zone.
6inch
It has been noted that Aquariums are big no no's to be placed inside the Bedroom, but since this would be a Studio type place and its very compact, it would be best to place a divider to separate the area where the aquarium is to be placed from the sleeping area or placed where the bed is to be situated.