Originally Posted by
rogerfries
Just seems wrong plugging in something and tossing it into a tank of water.
Submersible pumps are commonplace. No need to worry if the pump is designed to handle the liquid it is submersed in. Oil can affect some polymers that are used in the gaskets and seals. So keep that in mind. A GFI is a good idea (belt & suspenders).
"Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away." Antoine de Saint-Exupery (1900 - 1944)