aquarium robo brush

[scott711]

interesting little project.  I would probably use a piece of pvc/acrylic vs a wooden dowel:

 

http://www.instructables.com/id/Aquarium-Robo-Brush/

[Rob A]

What brand of toothpaste should you use with that? 

[Bruleyii]

Just remember to clean the tank, not to blend it!