There are two 20A isolated circuits to power the tank, with GFCI breakers installed in the panel. There are 28 individual power receptacles.
This is a power outlet to make it convenient to plug in a pump, light or tool. The lower outlet is controlled by a relay that is wired to the water makeup float switch. This makes a safe and handy way to pump water into the tank when doing a water change.
All of the controllers, power transformers, etc. are attached to the stand with 2″white velcro tape. It allows easy maintenance access and flexible mounting arrangements.