Automatic aquarium help to remove the build-up of algae or prevent the aquarium glass cleaner on the surface. This is, without any user intervention to achieve by Ls unique ability to, keeping the surface of your aquarium in one day. The first, the algae is almost invisible. It has, over time the surface of the aquarium to failure, it will gradually to be more difficult to remove. Marine Tank and found stubborn Coral Algae, or ignore all of your aquarium is to find the ball and is perfect for hazy, unsightly uses and results in a long time. More Effort and more. Need to remove algae, so your results are wont scratch your aquarium, with a longer, more difficult maintenance sessions can be connected. Automatic aquarium glass cleaner to clean the whole surface, which makes the appropriate cleaning pattern to calculate your aquariums detect the edges of your top, left and right when you need it. This is a memory to the distance of your edge. Each position and committed and start the wash cycle. You can perform the RoboSnail has this sequence to ensure a complete aquarium cleaning for each cleaning cycle to calculate. Battery Type: Nickel Metal Hydride (NiMH) rechargeable 2/3 AAA size mAh 4.8 V DC.