For stubborn white stains! Glass Aquarium Cleaner Clean Film 1 Bag Target Glass Aquariums Features: Special plastic film cleaner that can safely and easily remove stubborn white stains (primarily calcium) that adhere to glass aquariums or glass lids. No chemicals are used, so you can use it with confidence. Anyone can easily clean it without moving the biomechanics or aquatic grass in the aquarium, or removing the filter. Set Contents: Light blue film x 2, pink film x 3 sizes (approximate); Film: Width 1.2 x Depth 1.8 inches (30 x 45 mm); How to use: Soak the dirty area you want to clean with tap water or aquarium water. It is easy to use with water cloth or kitchen paper Press the back of the clean film to the area you are cleaning, and gently rub it in a small circular motion. The cloudy dirt is the amount of calcium that has been solidated. It is harmless even if you enter the aquarium, but please often wipe it with a towel and do work. If the wet part is dry, please re-wet it in order to avoid rubbing. Please use 2 different types depending on the stain conditions. Please test with pink film first, and use light blue film if it is difficult to clean. ● Not disposable so it can be used repeatedly. If the clean effect decreases and the dirt dropping becomes bad, replace it if the back is shaved and see through.