Yes, the joists in question are attached by that metal joist hangar (perhaps called a saddle bracket?). Anyway, I fully developed the basement about 5 years ago, and - as it happens- where the aquarium sits is directly above my workshop area and is therefore conveniently open to put whatever support I would need from below. So keepimg in mind it is still my workshop area and so do not wish to take up too much area, would a stragically placed telepost(s) or 4X4 post along that lone joist do it and do I allow for some sinking of the floor or just put the post snug to the joist and concrete floor. Also, the floor, of course, has no poured footing, so is that a concern?
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