Could you imagine a mini one to cruise around your tank
"Now you can survey the seven seas ... and not even get wet."
–Discovery.com
The HydroView remotely controlled underwater vehicle lets you check on an anchor, look for something that fell overboard or off a dock and study marine life
HydroView
Affordable and fun, this remote controlled underwater vehicle can record live video and capture photos in HD, streaming them to your iPad and allowing you to share with family and friends.
The vehicle includes the following:
LED lights.
HD camera.
Standard 75 foot cable.
Waterproof carrying case.
Topside box which produces vehicles Wi-Fi.
Free download of the application to use on your iPad, PC or MAC computer.
See the underwater world in an innovative way—whether it's searching for lost valuables, studying marine life, checking water depths or inspecting under your boat. Stay dry and safe from topside while recording videos and snapping photos to upload and share on social media sites.
Uses of the Hydroview, remotely controlled underwater vehicle include exploring sea life, inspecting the anchor and propeller, checking the hull, looking for lost objects and more.
http://www.aquabotix.com/hydroview.php
Mike