Eco-Aquarium Water Purifier Cube Activated Carbon Fish Tank Cleaning Filter Household Description: Changing cloudy aquarium water can be troublesome... An unclean aquarium is harmful to the life of your pet fish. Maintain the sanitation of your water pets habitat with the help of this Eco-Aquarium Water Purifier Cube. A fish tank cleaner that filters dirt, cloudiness, and odor... Honeycombed Ultra-Absorption Activated Carbon Block HOW TO USE Wash the cube with warm water and soap before using. Recommended placement is near the water inlet of the fish tank pump. Do not position the grid filter downward, otherwise, it will clog up and affect the filtration effect. For best results, rinse or replace the filter every 3 to 6 months. Features: The aquarium filter water cube is made of activated carbon, dense grid hole structure. It can absorb 99% of harmful bacteria in the aquarium, as well as odor. It can effectively reduce the nitrate bacteria in the aquarium and adjust the PH value. It can also absorb the organic waste in the aquarium. Change or clean every 3 or 6 months, save to your energy and time. Great filtration material Specification: Size: 10cmx10cmx5cm / 10cmx10cmx10cm Color: Black Material: Activated Carbon Package Included: 1 x Aquarium Filter Water Tube Note: 1. Due to the different monitor and lighting effect, the actual color of the item may be slightly different from the color shown on the pictures. 2. Please allow 1-3cm error due to manual measurement. (1 inch = 2.54 cm) Thanks for your support :)