The Brush icon. The Brush Icon is used to clean your fish Tank. Cleaning your tank will earn you experience. Tanks should be cleaned frequently to avoid having the Tank Cleanliness meter get too low. After all, nobody wants their Fish swimming in dirty water. See AlsoEdit Gameplay Retrieved from "https://happyaquarium.fandom.com/wiki/Brush?oldid=4176" Categories: Gameplay Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.