Also consider the footprint of the tank/stand and how the weight will be distributed. If it's on a metal stand which usually have 4 feet of about 4-6 square inches, all that weight will be put onto 4 high PSI points.
Or think of it in another way... 1300 lbs is about 7 to 8 people. If your tank's foot print is say 4'x2' that's 8 square feet, then you get 8 people to stand in that area, does your floor squeak and squawk under that pressure?
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