Hello; Should you determine a dehumidifier is needed, it may do a better job out in the room rather than in a stand. They take moisture from the air in general and my take has been one out in the fish room works for me.
I started to use a dehumidifer the second winter in my current home. The house has a heat pump which is a cool type heat and does not remove moisture from the air in the heating mode. With my tanks and the other moisture producing things in the closed house, I was getting a large amount of condensation during the winter months.
Tanks in a room closed off from the rest of a house or in a damp basement may present a more serious dampness issue. So much may depend on your situaion.
I only need to run the dehumidifier during the cold months. During the warm months the AC function of the heat pump will remove moisture from the air. I also like to open my house during warm months as much as is comfortable. A dehumidifier functions much like an air conditioner and I suspect also uses a fair amount of energy. The compressor creates very cold metal coils and a fan circulates the house air across those coils where it condenses and drips into a tank. If you do not have a general high humidity issue in the home, then a dehumidifier may be a more expensive solution than is actually needed.
A fan as suggested can help inside a cabinet stand. Something as simple as leaving the door open a bit or a few holes in non structural parts of the stand may give enough circulation to keep things dry.
Good luck