what equip goes on a GFCI plug

[Shipwreck]

Really if you don't understand how a GFCI works then I would be hiring an electrician to install it. Improperly installed they are just as dangerous as a regular outlet, and will also void your insurance if the wiring causes a fire.

Everything that goes in or near the tank should be on a GFCI. As well other non tank related plugs with x feet of the tank, or any wet location should also be GFCI protected by code.