So I'm putting in a 135 gallon tank in a new house, since it's quite larger than the 50/60 gallons I've been used to, I'm wondering what others do for supporting the floor in the basement.

The tank will be against a supporting wall on the perimeter of the house, so only a few feet from the basement walls as well in terms of location. I was looking at getting a 4x4 going across the joists supported by a single house jack.

Overkill?