I have a large reef tank in my home that couldn't be placed in a corner or against a outer wall. The base spread the weight evenly but after it being set up there for a year or so I am noticing that when I walk by the water in the tank really moves around. The floor appears to be getting weak and possibly sagging. I had thought I would make some concrete pads and use screw jacks and opposite direction beams to support it. Is there a better way to provide support for the floor?
The floor can probably be reinforced but we need to know what we're dealing with first. Is the floor actually framed with open web trusses or is it dimensional lumber joists or I-joists? A picture of the floor system under the tank would help immensely.
Out of curiosity, how many gallons of water are we talking here?