Perhaps you know that: You’ve been planning your aquarium for some time, and of course you made smaller mistake in your plans. That’s what happened to me. In my cabinet, there is no dry area to store sensitive electrical equipment / control computer or plug sockets safely without creating rust. Thus, I had to store my plug sockets in a messy way behind the aquarium, and as I needed more and more plug sockets it became a nightmare behind my tank :-). And since there is a little baby rushing around the tank I needed to secure this dangerous sitiuation.
After some consideration, I came to the conclusion to build another cabinet behind the aquarium to store the plug connectors safely and easy to access (single-controlled).
The following pictures show the construction.