Glass Scraper + spare blades
This is by far one of the easiest and quickest way to clean your glass. It removes scum, algae and water marks. Use it on the inside and outside.
We recommend using a new blade every time you clean your tank. NB: Be very careful not to touch your silicon with the blade. It will come and as a result your tank might leak.
McMerwe’s Review: This is what we use to clean our tanks. Makes our job very easy. We use a new blade every day and try to keep the razor straight to avoid scratching the glass. This does not work on curved pannels. Also be carefull of you silicone as it will remove it instantly. Good affordable product. Its a Chinese cheap plastic product, but the razors has never scratched our glass (Rating 4/5).