You can do Feng Shui many ways. As it goes in a 20 year cycle,, find your wealth direction and you can keep the aquarium in the same place for the 20 years. Or, if you wish to change and update every year, that is also a choice. It is all up to you as to how you wish to use Feng Shui in your home. I go with the 20 year cycle as it is too hard to move it!