AQUAEL ZeoMax Plus is a granular zeolite filter material. Due to its chemical structure, this zeolite guarantees the absorption of organic impurities of nitrate and phosphate compounds dissolved in the water. AQUAEL ZeoMax Plus creates crystal clear and healthy water in the aquarium. AQUAEL ZeoMax Plus is ready for immediate use and does not require rinsing or other preparation for use. The package contents are added directly to the filter basket or chamber.AQUAEL ZeoMax Plus+ selected zeolite with large absorption capacity+ easy to use+ removes organic impurities+ for clean and healthy water