Floor support??

[Aquattro]

hmm...I could pour a concrete slab with post tension cabling, but my wife might balk!! The tank will be at a 45 angle from the wall with 2 load bearing walls beneath (corner of the garage. With the age of the house, I would guess the joists are true 2X8s (maybe 10) on 16" centers.I don't know what the floor is (plywood, slats, etc). The floor is finished in hardwood. The ceiling below is drywall covered with stucco. That's about all I can say without removing material.