reading this i think im more concerned as to what killed your sharks... I wouldnt totally rely on automated systems either. routine manual checks of the tank can help prevent bad thing if one automated system fails.
+1 lolI'm taking the nanny with a candle stick.
"That's a Moray"....
That made me let out a brisks "Ha!". I love a good play on words lol.
mantis shrimp is my guess. Those things are vicious and could easily eat a smaller eel and damage the sharks.