Well here's my plans for the 100gal upstairs.
The landlord said go for it, though if anything goes wrong I'm liable for any damage. I can deal with that.
SO anyway I'm going to put a 3/4" piece of high grade plywood under the stand to help distribute the weight better then on just the 4 2x4's legs of the stand. I also might also attach the stand to the wall via lag bolts into studs. That will help incase of an E.Q. I'm not sure if I will just cut the ply to the size of the stand or maybe go bigger and just get a throw rug to cover the ply in front of the tank.
What do you all think about those plans?
I'm sure I probably don't have to do any of this for just a 100gal, but I'd rather over do something and have piece of mind, then take a gamble and actually have to pay to fix something.