Going back to the first post... and avoiding the comments about a brand new (uncycled?) tank that you are adding sand and fish to in the same day... I have another concern.
Does your tank span two pieces of furniture, as it appears in the picture? and did you use something along the lines of playing cards to make up the difference under the front right corner because the tank was wobbling? I have had some tanks in some sketchy places in my years, but that would keep me up at night... and you are luck for every week that passes without the tank failing. At the very least, you need to put a piece of plywood under the tank... Just trying to be helpful, not sure how nobody else mentioned this...
