If you going to be upgrading from current 20 gallon long tank to a new 29 gallon tank. Do you think this desk that the current 20gal is on would hold the 29gal tank?
Yes. Some people will actually stand in the middle on top so they can test the structural integrity of the table.
But, don’t do such a small upgrade, you’ll end up buying a bunch of tanks till you get your end game tank, save up for the tank size you want and just buy it instead moving up a single tank size at a time.
Keep your tank centered, as to evenly distribute the load. An uneven load on the desk means torque, torque will eventually cause a structural failure.
Also, please mount your surge protector in the wall next to your outlet. It might save your life!
A desk can totally hold 29gal or more. Desks carry volumes of books for years and can support persons standing on them to change a light bulb. Plus that desk looks older therefore likely better sturdier quality.