This is how to get your aquarium panes clean and to remove unsightly lime residues. It is non-toxic, in case it accidentally splashes into the aquarium water. Splashes would NEVER be okay with chemical kitchen cleaners!
You can find out more about the liquid pane cleaner here: JBL PROCLEAN AQUA
If you would like to learn more about cleaning in the aquarium, take a look at the Themeworld Aquarium: Cleaning