Any floor that is rated for humans and their furniture is more than capable of handling a 65 gal fish tank.
Fish tank weight distribution 2nd floor.
An average bathtub holds about 40 50 gallons 332 415 pounds.
The weight of the stand is typically around 100 lbs and needs to be sturdy enough to hold the full weight of the tank itself.
A standard 75 gallon filled 75 gallon aquarium weighs about 800 lbs considering water weight the weight of the glass enclosure and the weight of the rocks and decorations at the bottom of the tank.
I would like to put a 12 6 ft billiards table which stands on 8 legs and weighs approx.
Is this a high tank or a long tank.
Example 40g high vs 40g long the long tank spreads more weight over the floor so it would have more supports under it.
Unless your joists are way out of code.
I have a 2nd story rec room measuring 24 18 in an all brick house built in 2011.
Typical new home manufactured floor trusses only good for 10 pounds per square foot in a large room and maybe as much as 20 pounds per square foot in a small.
Water weighs about 8 3 pounds per gallon.
Also the the shape of the tank would matter as well.
In addition to basic rectangles fish tanks may be in the shape of hexagons pentagons or even cylinders.
And the closer to the wall the aquarium can be positioned the more total weight in pounds the floor joists can support.
Typical tank tables have only 4 legs but even that means 200 pounds per leg which is on the order of a person standing on one foot.
I would think you d be ok to do a 50 gallon tank after all 415 pounds is like two people standing side by side in the same spot which i m sure your floor can handle.
You have nothing to worry about.
Depends upon exactly where you put it and a good understanding of your house structure.
The rec room is the only room on the 2nd floor and contains attic access and a full bath.
A 50 gallon fish tank will have the same weight measurements whether it is.
The less surface area of the floor it takes up per gallon the higher the danger would be.